Submission #554409

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
554409	2022-04-28T10:49:53 Z	leaked	Paint (COI20_paint)	C++17	Compilation error	0 ms	0 KB

paint

nt
#include <bits/stdc++.h>

#define f first
#define s second
#define m_p make_pair
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define pw(x) (1LL<<(x))
#define sz(x) (int)(x).size()
#define vec vector

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
const int N=2e5+1;
const int K=200;
const int tx[4]={1,-1,0,0};
const int ty[4]={0,0,1,-1};
int who[K],p[N],cnt[N],id[N];
bitset<K> ust[N];

unordered_map<int,int> ids[N];
/// for comp lets mantain colours
vec<vec<int>> go[N];

void addj(int v,int x,int y){
    if(ids[v].find(x)==ids[v].end()){
        go[v].pb(vec<int>());
        ids[v][x]=sz(ids[v]);
    }
//    assert(sz(go[v])==sz(ids[v]));
    go[v][ids[v][x]].pb(y);
}
int get(int v){
//    cout<<"VT "<<v<<endl;
    return p[v]=(p[v]==v?v:get(p[v]));
}
bool mg(int a,int b,bool need=0){
//    cout<<"MEG "<<a<<' '<<b<<endl;
    a=get(a),b=get(b);
//        cout<<"MEG "<<a<<' '<<b<<endl;

    if(a==b) return 0;

    if(cnt[a]>cnt[b]) swap(a,b);

    for(auto &z : ids[a]){
        for(auto &u : go[a][z.s])
            addj(b,z.f,u);
    }

    ids[a].clear();go[a].clear();

    if(id[a]!=-1) id[b]=id[a];
//        ust[b]|=ust[a];/// n*k/64;
    p[a]=b;cnt[b]+=cnt[a];

//        cout<<"IMG "<<a<<' '<<b<<endl;

    if(need){
        ust[b]|=ust[a];/// n*k/64;

        if(id[b]!=-1){
            for(int j=0;j<K;j++){
//                cout<<"WOW "<<who[j]<<endl;
                if(ust[b][j] && who[j]!=-1){
//                    cout<<"NO "<<endl;
                    ust[get(who[j])][id[b]]=1;
                }
            }
        }
    }
//    cout<<"EXIT "<<endl;
    return 1;
}
int n,m;
int idl(int i,int j){
    return i*m+j;
}



signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    iota(p,p+N,0);fill(cnt,cnt+N,1);
    cin>>n>>m;
    vec<vec<int>>a(n,vec<int>(m));
    vec<int>b(n*m);
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            cin>>a[i][j];
            b[i*m+j]=a[i][j];
        }
    }
    int q;
    cin>>q;
    vec<int> ii(q),jj(q),c(q);
    for(int i=0;i<q;i++){
        cin>>ii[i]>>jj[i]>>c[i];--ii[i];--jj[i];
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(i && a[i-1][j]==a[i][j]) mg(idl(i,j),idl(i-1,j));
            if(j && a[i][j-1]==a[i][j]) mg(idl(i,j),idl(i,j-1));
        }
    }
//    for(int i=0;i<n;i++){
//        for(int j=0;j<m;j++)
//            cout<<ds.get(id(i,j))<<' ';
//        cout<<'\n';
//    }
//    return 0;
    vec<int>used(n*m,-1);
    int tt=1;
    fill(who,who+K,-1);
    for(int t=0;t<q;t+=K){
        int l=t,r=min(q,t+K);
        for(int i=0;i<n*m;i++) id[i]=-1,ids[i].clear(),go[i].clear();
        ++tt;
        for(int i=l;i<r;i++){
            int v=get(idl(ii[i],jj[i]));
            who[i-l]=-1;
            if(used[v]!=t){
                id[v]=i-l;
                used[v]=t;
                who[i-l]=v;

            }
        }

        /// very bad
        for(int i=0;i<n*m;i++){
            if(get(i)==i)
                ust[i].reset();
        }

        for(int i=0;i<n;i++){
            for(int j=0;j<m;j++){
                int v=get(idl(i,j));
                for(int x=0;x<4;x++){
                    int ni=tx[x]+i,nj=ty[x]+j;
                    if(ni>=0&&ni<n&&nj>=0&&nj<m){
                        int u=get(idl(ni,nj));

                        if(used[v]==t)
                            ust[u][id[v]]=1;
//                        if(v==6)
//                            cout<<"ADD "<<i<<' '<<j<<' '<<' '<<b[u]<<' '<<u<<endl;
                        addj(v,b[u],u);
                    }
                }
            }
        }

        for(int i=l;i<r;i++){
            int v=get(idl(ii[i],jj[i]));
            b[v]=c[i];
//            cout<<"ID "<<v<<' '<<b[v]<<' '<<c[i]<<endl;
            if(ids[v].find(b[v])!=ids[v].end()){
                int j=ids[v][b[v]];
//                cout<<sz(go[v][j])<<endl;
                vec<int> me=go[v][j];
                for(auto &z : me){
//                    cout<<"ZET "<<z<<' '<<sz(go[v][j])<<endl;
                    if(b[get(z)]==b[v])
                        mg(v,z,1);
                }
//                cout<<"EXIT"<<endl;
                go[v][j].clear();
            }
            for(int j=0;j<K;j++){
                if(who[j]!=-1 && b[get(who[j])]==b[v] && ust[v][j])
                    mg(who[j],v,1);
            }
        }
//        cout<<"DEBUG "<<endl;
////        for(int i=0;i<n;i++){
////            for(int j=0;j<m;j++)
////                cout<<b[get(idl(i,j))]<<' ';
//            cout<<'\n';
//        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++)
            cout<<b[get(idl(i,j))]<<' ';
        cout<<'\n';
    }
    return 0;
}
/*
6 6
1 2 1 2 2 2
2 1 2 1 3 1
2 3 3 2 3 2
2 2 1 2 2 2
2 2 2 2 2 2
2 2 2 2 2 1

6 6
1 2 1 2 2 2
3 1 2 1 3 1
3 3 2 3 2 2
2 3 1 3 3 2
3 3 3 3 3 3
2 2 2 2 2 1

6 6
1 2 1 2 2 2
3 1 2 1 3 1
3 3 2 3 2 2
2 3 1 3 3 2
3 3 3 3 3 3
2 2 2 2 2 1


6 6
1 2 1 2 2 2
3 1 2 1 3 1
3 3 2 3 2 2
2 3 1 3 3 2
3 3 3 3 3 3
2 2 2 2 2 1
*/

Compilation message

paint.cpp:1:1: error: 'nt' does not name a type; did you mean 'int'?
    1 | nt
      | ^~
      | int
In file included from /usr/include/c++/10/cmath:43,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/ext/type_traits.h:162:35: error: 'bool __gnu_cxx::__is_null_pointer' redeclared as different kind of entity
  162 |   __is_null_pointer(std::nullptr_t)
      |                                   ^
/usr/include/c++/10/ext/type_traits.h:157:5: note: previous declaration 'template<class _Type> bool __gnu_cxx::__is_null_pointer(_Type)'
  157 |     __is_null_pointer(_Type)
      |     ^~~~~~~~~~~~~~~~~
/usr/include/c++/10/ext/type_traits.h:162:26: error: 'nullptr_t' is not a member of 'std'
  162 |   __is_null_pointer(std::nullptr_t)
      |                          ^~~~~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:402:26: error: 'std::size_t' has not been declared
  402 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
/usr/include/c++/10/type_traits:403:25: error: '_Size' was not declared in this scope
  403 |     struct is_array<_Tp[_Size]>
      |                         ^~~~~
/usr/include/c++/10/type_traits:403:31: error: template argument 1 is invalid
  403 |     struct is_array<_Tp[_Size]>
      |                               ^
/usr/include/c++/10/type_traits:508:42: error: 'nullptr_t' is not a member of 'std'
  508 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                          ^~~~~~~~~
/usr/include/c++/10/type_traits:508:51: error: template argument 1 is invalid
  508 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                                   ^
/usr/include/c++/10/type_traits:1351:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1351 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1351:57: error: template argument 1 is invalid
 1351 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                                         ^
/usr/include/c++/10/type_traits:1351:57: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1360:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1360 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1360:46: error: template argument 1 is invalid
 1360 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
/usr/include/c++/10/type_traits:1360:46: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1362:26: error: 'std::size_t' has not been declared
 1362 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
/usr/include/c++/10/type_traits:1363:21: error: '_Size' was not declared in this scope
 1363 |     struct rank<_Tp[_Size]>
      |                     ^~~~~
/usr/include/c++/10/type_traits:1363:27: error: template argument 1 is invalid
 1363 |     struct rank<_Tp[_Size]>
      |                           ^
/usr/include/c++/10/type_traits:1364:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1364 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1364:65: error: template argument 1 is invalid
 1364 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/10/type_traits:1364:65: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1368:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1368 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1368:65: error: template argument 1 is invalid
 1368 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/10/type_traits:1368:65: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1373:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1373 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1373:46: error: template argument 1 is invalid
 1373 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
/usr/include/c++/10/type_traits:1373:46: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1375:42: error: 'std::size_t' has not been declared
 1375 |   template<typename _Tp, unsigned _Uint, std::size_t _Size>
      |                                          ^~~
/usr/include/c++/10/type_traits:1376:23: error: '_Size' was not declared in this scope
 1376 |     struct extent<_Tp[_Size], _Uint>
      |                       ^~~~~
/usr/include/c++/10/type_traits:1376:36: error: template argument 1 is invalid
 1376 |     struct extent<_Tp[_Size], _Uint>
      |                                    ^
/usr/include/c++/10/type_traits:1377:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1377 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1378:24: error: '_Size' was not declared in this scope
 1378 |           _Uint == 0 ? _Size : extent<_Tp,
      |                        ^~~~~
/usr/include/c++/10/type_traits:1379:28: error: template argument 1 is invalid
 1379 |           _Uint - 1>::value>
      |                            ^
/usr/include/c++/10/type_traits:1379:28: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1384:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1384 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdlib.h:31,
                 from /usr/include/c++/10/bits/std_abs.h:38,
                 from /usr/include/c++/10/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/stl_pair.h:59,
                 from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/type_traits:1386:31: error: template argument 1 is invalid
 1386 |              _Uint - 1>::value>
      |                               ^
/usr/include/c++/10/type_traits:1386:31: note: invalid template non-type parameter
/usr/include/c++/10/type_traits:1975:26: error: 'std::size_t' has not been declared
 1975 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
/usr/include/c++/10/type_traits:1976:30: error: '_Size' was not declared in this scope
 1976 |     struct remove_extent<_Tp[_Size]>
      |                              ^~~~~
/usr/include/c++/10/type_traits:1976:36: error: template argument 1 is invalid
 1976 |     struct remove_extent<_Tp[_Size]>
      |                                    ^
/usr/include/c++/10/type_traits:1988:26: error: 'std::size_t' has not been declared
 1988 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
/usr/include/c++/10/type_traits:1989:35: error: '_Size' was not declared in this scope
 1989 |     struct remove_all_extents<_Tp[_Size]>
      |                                   ^~~~~
/usr/include/c++/10/type_traits:1989:41: error: template argument 1 is invalid
 1989 |     struct remove_all_extents<_Tp[_Size]>
      |                                         ^
/usr/include/c++/10/type_traits:2047:12: error: 'std::size_t' has not been declared
 2047 |   template<std::size_t _Len>
      |            ^~~
/usr/include/c++/10/type_traits:2052:23: error: '_Len' was not declared in this scope
 2052 |  unsigned char __data[_Len];
      |                       ^~~~
/usr/include/c++/10/type_traits:2067:12: error: 'std::size_t' has not been declared
 2067 |   template<std::size_t _Len, std::size_t _Align =
      |            ^~~
/usr/include/c++/10/type_traits:2067:30: error: 'std::size_t' has not been declared
 2067 |   template<std::size_t _Len, std::size_t _Align =
      |                              ^~~
/usr/include/c++/10/type_traits:2068:48: error: '_Len' was not declared in this scope
 2068 |     __alignof__(typename __aligned_storage_msa<_Len>::__type)>
      |                                                ^~~~
/usr/include/c++/10/type_traits:2068:52: error: template argument 1 is invalid
 2068 |     __alignof__(typename __aligned_storage_msa<_Len>::__type)>
      |                                                    ^
/usr/include/c++/10/type_traits:2073:23: error: '_Len' was not declared in this scope
 2073 |  unsigned char __data[_Len];
      |                       ^~~~
/usr/include/c++/10/type_traits:2074:37: error: '_Align' was not declared in this scope
 2074 |  struct __attribute__((__aligned__((_Align)))) { } __align;
      |                                     ^~~~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/bits/stl_pair.h:92:12: error: 'std::size_t' has not been declared
   92 |   template<std::size_t...>
      |            ^~~
/usr/include/c++/10/bits/stl_pair.h:449:36: error: 'std::size_t' has not been declared
  449 |       template<typename... _Args1, std::size_t... _Indexes1,
      |                                    ^~~
/usr/include/c++/10/bits/stl_pair.h:450:36: error: 'std::size_t' has not been declared
  450 |                typename... _Args2, std::size_t... _Indexes2>
      |                                    ^~~
/usr/include/c++/10/bits/stl_pair.h:453:27: error: '_Indexes1' was not declared in this scope
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                           ^~~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:453:36: error: expected parameter pack before '...'
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                    ^~~
/usr/include/c++/10/bits/stl_pair.h:453:39: error: template argument 1 is invalid
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                       ^
/usr/include/c++/10/bits/stl_pair.h:453:55: error: '_Indexes2' was not declared in this scope
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                       ^~~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:453:64: error: expected parameter pack before '...'
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                                ^~~
/usr/include/c++/10/bits/stl_pair.h:453:67: error: template argument 1 is invalid
  453 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                                   ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:65,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/bits/stl_iterator_base_types.h:125:67: error: 'ptrdiff_t' does not name a type
  125 |   template<typename _Category, typename _Tp, typename _Distance = ptrdiff_t,
      |                                                                   ^~~~~~~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:65,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/bits/stl_iterator_base_types.h:1:1: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
  +++ |+#include <cstddef>
    1 | // Types used in iterator implementation -*- C++ -*-
In file included from /usr/include/c++/10/bits/stl_algobase.h:65,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from paint.cpp:2:
/usr/include/c++/10/bits/stl_iterator_base_types.h:214:15: error: 'ptrdiff_t' does not name a type
  214 |       typedef ptrdiff_t                   difference_type;
      |               ^~~~~~~~~
/usr/include/c++/10/bits/stl_iterator_base_types.h:214:15: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
/usr/include/c++/10/bits/stl_iterator_base_types.h:225:15: error: 'ptrdiff_t' does not name a type
  225 |