답안 #653202

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
653202	2022-10-26T07:36:54 Z	Rafi22	Prize (CEOI22_prize)	C++14	컴파일 오류	0 ms	0 KB

Main

oj.uz
SUBMISSION #653143
#	Submission timeUTC+2	Handle	Problem	Language	Result	Execution time	Memory
653143	2022-10-25 21:30:49	Rafi22	Prize (CEOI22_prize)	C++14	
10 / 100
1828 ms	504904 KB
Main
#include <bits/stdc++.h>
 
using namespace std;
 
//#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
#define ld long double
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;
 
const int N=1000007;
 
vector<int>G1[N],G2[N],G3[N];
int d1[N],d2[N];
bool odw[N];
vector<pair<int,int>>X[N],X1[N];
bool is[N];
int n,k,q,t;
 
int skok[N][20];
int pre[N];
int post[N];
int c=0;
 
void dfs(int v,int o)
{
    pre[v]=++c;
    skok[v][0]=o;
    for(int i=1;i<20;i++) skok[v][i]=skok[skok[v][i-1]][i-1];
    if(k>0)
    {
        cout<<v<<" ";
        is[v]=1;
        k--;
    }
    for(auto u:G1[v]) dfs(u,v);
    post[v]=++c;
}
 
int lca(int u,int v)
{
    if(pre[u]<=pre[v]&&post[u]>=post[v]) return u;
    if(pre[v]<=pre[u]&&post[v]>=post[u]) return v;
    for(int i=19;i>=0;i--) if(!(pre[skok[u][i]]<=pre[v]&&post[skok[u][i]]>=post[v])) u=skok[u][i];
    return skok[u][0];
}
 
vector<pair<pair<int,int>,int>>xd;
 
void qry(int u,int v,int x)
{
    if(!is[u]||!is[v]) for(int i=0;i<1000000000;i++) dfs(1,0);
    cout<<"? "<<u<<" "<<v<<endl;
    xd.pb({{u,v},x});
}
 
int last[N];
int last1[N];
 
int pre1[N];
int post1[N];
 
void dfs1(int v)
{
    pre1[v]=c++;
    int l=0,l1=0,cc=0;
    for(auto u:G2[v])
    {
        dfs1(u);
        if(last[u]>0)
        {
            cc++;
            if(is[v])
            {
                G3[v].pb(last1[u]);
                qry(last[u],v,v);
            }
            else if(cc>1)
            {
                if(cc==2) G3[v].pb(l1);
                G3[v].pb(last1[u]);
                qry(l,last[u],v);
            }
            else
            {
                l=last[u];
                l1=last1[u];
            }
        }
    }
    if(is[v]) last[v]=v;
    else last[v]=l;
    if(is[v]||cc>1) last1[v]=v;
    else last1[v]=l1;
    post1[v]=c++;
}
 
int skok1[N][20];
 
 
void dfs2(int v,int o)
{
    pre1[v]=c++;
    skok1[v][0]=o;
    for(int i=1;i<20;i++) skok1[v][i]=skok1[skok1[v][i-1]][i-1];
    for(auto u:G3[v]) dfs2(u,v);
    post1[v]=c++;
}
 
int lca1(int u,int v)
{
    if(pre1[u]<=pre1[v]&&post1[u]>=post1[v]) return u;
    if(pre1[v]<=pre1[u]&&post1[v]>=post1[u]) return v;
    for(int i=19;i>=0;i--) if(!(pre1[skok1[u][i]]<=pre1[v]&&post1[skok1[u][i]]>=post1[v])) u=skok1[u][i];
    return skok1[u][0];
}
 
int U[N],V[N];
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>k>>q>>t;
    int K=k;
    int r1,r2,p;
    for(int i=1;i<=n;i++)
    {
        cin>>p;
        if(p==-1) r1=i;
        else G1[p].pb(i);
    }
    for(int i=1;i<=n;i++)
    {
        cin>>p;
        if(p==-1) r2=i;
        else G2[p].pb(i);
    }
    dfs(r1,r1);
    cout<<endl;
    c=0;
    dfs1(r2);
    if(sz(xd)>K)
    {
        return 2137;
      //  for(int i=0;i<100000000;i++) dfs(1,0);
    }
    cout<<"!"<<endl;
    for(auto c:xd)
    {
        int u=c.st.st,v=c.st.nd,x=c.nd;
        int d1,d2,d3,d4;
        cin>>d1>>d2>>d3>>d4;
        int l=lca(u,v);
        X[l].pb({u,d1});
        X[u].pb({l,d1});
        X[l].pb({v,d2});
        X[v].pb({l,d2});
        X1[x].pb({u,d3});
        X1[u].pb({x,d3});
        X1[x].pb({v,d4});
        X1[v].pb({x,d4});
    }
    c=0;
    dfs2(last1[r2],last1[r2]);
    deque<int>Q;
    Q.pb(r1);
    odw[r1]=1;
    while(sz(Q)>0)
    {
        int v=Q[0];
        Q.pop_front();
        for(auto x:X[v])
        {
            if(odw[x.st]) continue;
            odw[x.st]=1;
            Q.pb(x.st);
            if(pre[x.st]>=pre[v]) d1[x.st]=d1[v]+x.nd;
            else d1[x.st]=d1[v]-x.nd;
        }
    }
    memset(odw,0,sizeof odw);
    Q.pb(r2);
    odw[r2]=1;
    while(sz(Q)>0)
    {
        int v=Q[0];
        Q.pop_front();
        for(auto x:X1[v])
        {
            if(odw[x.st]) continue;
            odw[x.st]=1;
            Q.pb(x.st);
            if(pre1[x.st]>=pre1[v]) d2[x.st]=d2[v]+x.nd;
            else d2[x.st]=d2[v]-x.nd;
        }
    }
    for(int i=1;i<=t;i++) cin>>U[i]>>V[i];
    for(int i=1;i<=t;i++)
    {
        int u=U[i],v=V[i];
        int l=lca(u,v);
        cout<<d1[u]+d1[v]-2*d1[l]<<" ";
        l=lca1(u,v);
        cout<<d2[u]+d2[v]-2*d2[l]<<endl;
    }
 
 
    return 0;
}

Compilation message

Main.cpp:2:12: error: stray '#' in program
    2 | SUBMISSION #653143
      |            ^
Main.cpp:3:3: error: invalid preprocessing directive #Submission
    3 | # Submission timeUTC+2 Handle Problem Language Result Execution time Memory
      |   ^~~~~~~~~~
Main.cpp:79:2: error: extended character   is not valid in an identifier
   79 |     int l=0,l1=0,cc=0;
      |  ^
Main.cpp:79:5: error: extended character   is not valid in an identifier
   79 |     int l=0,l1=0,cc=0;
      |    ^
Main.cpp:85:2: error: extended character   is not valid in an identifier
   85 |             cc++;
      |  ^
Main.cpp:85:5: error: extended character   is not valid in an identifier
   85 |             cc++;
      |    ^
Main.cpp:85:8: error: extended character   is not valid in an identifier
   85 |             cc++;
      |      ^
Main.cpp:85:11: error: extended character   is not valid in an identifier
   85 |             cc++;
      |        ^
Main.cpp:85:14: error: extended character   is not valid in an identifier
   85 |             cc++;
      |          ^
Main.cpp:85:17: error: extended character   is not valid in an identifier
   85 |             cc++;
      |            ^
Main.cpp:91:2: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |  ^
Main.cpp:91:5: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |    ^
Main.cpp:91:8: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |      ^
Main.cpp:91:11: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |        ^
Main.cpp:91:14: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |          ^
Main.cpp:91:17: error: extended character   is not valid in an identifier
   91 |             else if(cc>1)
      |            ^
Main.cpp:93:2: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |  ^
Main.cpp:93:5: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |    ^
Main.cpp:93:8: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |      ^
Main.cpp:93:11: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |        ^
Main.cpp:93:14: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |          ^
Main.cpp:93:17: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |            ^
Main.cpp:93:20: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |              ^
Main.cpp:93:23: error: extended character   is not valid in an identifier
   93 |                 if(cc==2) G3[v].pb(l1);
      |                ^
Main.cpp:106:2: error: extended character   is not valid in an identifier
  106 |     if(is[v]||cc>1) last1[v]=v;
      |  ^
Main.cpp:106:5: error: extended character   is not valid in an identifier
  106 |     if(is[v]||cc>1) last1[v]=v;
      |    ^
Main.cpp:1:1: error: 'oj' does not name a type
    1 | oj.uz
      | ^~
In file included from /usr/include/c++/10/cmath:43,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:126:26: error: declaration of 'operator new' as non-function
  126 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                          ^~~~~~~~
/usr/include/c++/10/new:126:44: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  126 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                            ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:127:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  127 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/10/new:128:26: error: declaration of 'operator new []' as non-function
  128 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                          ^~~~~~~~
/usr/include/c++/10/new:128:46: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  128 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                              ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:129:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  129 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/10/new:135:34: error: 'std::size_t' has not been declared
  135 | void operator delete(void*, std::size_t) _GLIBCXX_USE_NOEXCEPT
      |                                  ^~~~~~
/usr/include/c++/10/new:137:36: error: 'std::size_t' has not been declared
  137 | void operator delete[](void*, std::size_t) _GLIBCXX_USE_NOEXCEPT
      |                                    ^~~~~~
/usr/include/c++/10/new:140:26: error: declaration of 'operator new' as non-function
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                          ^~~~~~~~
/usr/include/c++/10/new:140:44: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                            ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:140:52: error: expected primary-expression before 'const'
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                                    ^~~~~
/usr/include/c++/10/new:142:26: error: declaration of 'operator new []' as non-function
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                          ^~~~~~~~
/usr/include/c++/10/new:142:46: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                              ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:142:54: error: expected primary-expression before 'const'
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                                      ^~~~~
/usr/include/c++/10/new:174:33: error: declaration of 'operator new' as non-function
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                 ^~~~~~~~
/usr/include/c++/10/new:174:51: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                   ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:174:59: error: expected primary-expression before 'void'
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                           ^~~~
/usr/include/c++/10/new:176:33: error: declaration of 'operator new []' as non-function
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                 ^~~~~~~~
/usr/include/c++/10/new:176:53: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                     ^~~~~~
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 Main.cpp:8:
/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/exception_ptr.h:40,
                 from /usr/include/c++/10/exception:147,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/new:176:61: error: expected primary-expression before 'void'
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                             ^~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/nested_exception.h:40,
                 from /usr/include/c++/10/exception:148,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/type_traits:402:31: 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'; did you mean 'nullptr_t'?
  508 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                          ^~~~~~~~~
In file included from /usr/include/c++/10/cstddef:50,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:45,
                 from Main.cpp:8:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:433:29: note: 'nullptr_t' declared here
  433 |   typedef decltype(nullptr) nullptr_t;
      |                             ^~~~~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/nested_exception.h:40,
                 from /usr/include/c++/10/exception:148,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/type_traits:508:42: error: 'nullptr_t' is not a member of 'std'; did you mean 'nullptr_t'?
  508 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                          ^~~~~~~~~
In file included from /usr/include/c++/10/cstddef:50,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:45,
                 from Main.cpp:8:
/usr/lib/gcc/x86_64-linux-gnu/10/include/stddef.h:433:29: note: 'nullptr_t' declared here
  433 |   typedef decltype(nullptr) nullptr_t;
      |                             ^~~~~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,
                 from /usr/include/c++/10/bits/nested_exception.h:40,
                 from /usr/include/c++/10/exception:148,
                 from /usr/include/c++/10/ios:39,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Main.cpp:8:
/usr/include/c++/10/type_traits:508:51: error: template argument 1 is invalid
  508 |     struct __is_null_pointer_helper<std::nullptr_t>
      |