Submission #1117040

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117040		epicci23	Roller Coaster Railroad (IOI16_railroad)	C++17	Compilation error	0 ms	0 KiB

railroad

#include "bits/stdc++.h"
#include "railroad.h"
#define long long ll
#define all(v) v.begin() , v.end()
#define sz(a) (ll)a.size()
using namespace std;

const ll INF = 1e18;

struct DSU{
  vector<ll> par,siz;
  DSU(ll _n){
  	par.assign(_n,0);
  	iota(all(par),0);
    siz.assign(_n,1);
  }
  ll find(ll a){
  	if(par[a]==a) return a;
  	return par[a]=find(par[a]);
  }
  void unite(ll a,ll b){
  	a = find(a) , b = find(b);
  	if(a == b) return;
  	if(siz[a] > siz[b]) swap(a, b);
  	siz[b] += siz[a];
  	par[a] = b;
  }
};



ll plan_roller_coaster(vector<int> _s, vector<int> _t){
  ll n = sz(_s);
  array<ll,2> ar[n + 5];
  for(ll i = 1; i <= n; i++) ar[i][0] = _s[i], ar[i][1] = _t[i];
  ar[0] = {INF,1LL};

  vector<ll> zip;
  for(ll i=0;i<=n;i++){
  	zip.push_back(ar[i][0]);
  	zip.push_back(ar[i][1]);
  }

  sort(all(zip));
  zip.erase(unique(all(zip)),zip.end());
  
  auto Get = [&](ll val) -> ll{
    ll it = lower_bound(all(zip),val) - zip.begin();
    return it;
  };

  ll m = sz(zip);
  vector<ll> art(m+5,0),eks(m+5,0);
  DSU dsu(m+5);

  for(ll i = 0; i <= n ; i++){
  	ll a = Get(ar[i][0]);
    art[a]++;
    ll b = Get(ar[i][1]);
    eks[b]++;
    dsu.unite(a,b);
  }
  
  ll pa=0,pb=0,ans=0;
  for(ll i=0;i<m;i++){
    pa += art[i];
    pb += eks[i];
    if(pa > pb) ans+=(pa-pb)*(zip[i+1]-zip[i]);
    if(pa != pb) dsu.unite(i,i+1);
  }

  vector<array<ll,3>> edges;
  for(ll i=0;i+1<m;i++){
  	if(dsu.find(i)!=dsu.find(i+1)) edges.push_back({zip[i+1]-zip[i],i,i+1});
  }

  sort(all(edges));
  for(auto x:edges){
  	if(dsu.find(x[1])!=dsu.find(x[2])){
  	  ans += x[0];
  	  dsu.unite(x[1],x[2]);
  	}
  }

  return ans;
}


/*void _(){
  ll n; cin >> n;
  array<ll,2> ar[n+5];
  for(ll i=1;i<=n;i++) cin >> ar[i][0] >> ar[i][1];
  ar[0] = {INF,1};

  vector<ll> zip;
  for(ll i=0;i<=n;i++){
  	zip.push_back(ar[i][0]);
  	zip.push_back(ar[i][1]);
  }

  sort(all(zip));
  zip.erase(unique(all(zip)),zip.end());
  
  auto Get = [&](ll val){
    ll it = lower_bound(all(zip),val) - zip.begin();
    return it;
  };

  ll m = sz(zip);
  vector<ll> art(m+5,0),eks(m+5,0);
  DSU dsu(m+5);

  for(ll i = 0; i <= n ; i++){
  	ll a = Get(ar[i][0]);
    art[a]++;
    ll b = Get(ar[i][1]);
    eks[b]++;
    dsu.unite(a,b);
  }
  
  ll pa=0,pb=0,ans=0;
  for(ll i=0;i<m;i++){
    pa += art[i];
    pb += eks[i];
    if(pa > pb) ans+=(pa-pb)*(zip[i+1]-zip[i]);
    if(pa != pb) dsu.unite(i,i+1);
  }

  vector<array<ll,3>> edges;
  for(ll i=0;i+1<m;i++){
  	if(dsu.find(i)!=dsu.find(i+1)) edges.push_back({zip[i+1]-zip[i],i,i+1});
  }

  sort(all(edges));
  for(auto x:edges){
  	if(dsu.find(x[1])!=dsu.find(x[2])){
  	  ans += x[0];
  	  dsu.unite(x[1],x[2]);
  	}
  }

  cout << ans << '\n';
}

int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  ll tc=1;//cin >> tc;
  while(tc--) _();
  return 0;
}*/

Compilation message (stderr)

railroad.cpp:8:7: error: 'll' does not name a type; did you mean 'all'?
    8 | const ll INF = 1e18;
      |       ^~
      |       all
railroad.cpp:11:10: error: 'll' was not declared in this scope; did you mean 'all'?
   11 |   vector<ll> par,siz;
      |          ^~
      |          all
railroad.cpp:11:12: error: template argument 1 is invalid
   11 |   vector<ll> par,siz;
      |            ^
railroad.cpp:11:12: error: template argument 2 is invalid
railroad.cpp:12:9: error: expected ')' before '_n'
   12 |   DSU(ll _n){
      |      ~  ^~~
      |         )
railroad.cpp:17:3: error: 'll' does not name a type; did you mean 'all'?
   17 |   ll find(ll a){
      |   ^~
      |   all
railroad.cpp:21:14: error: 'll' has not been declared
   21 |   void unite(ll a,ll b){
      |              ^~
railroad.cpp:21:19: error: 'll' has not been declared
   21 |   void unite(ll a,ll b){
      |                   ^~
railroad.cpp: In member function 'void DSU::unite(int, int)':
railroad.cpp:22:14: error: no matching function for call to 'find(int&)'
   22 |    a = find(a) , b = find(b);
      |              ^
In file included from /usr/include/c++/10/bits/locale_facets.h:48,
                 from /usr/include/c++/10/bits/basic_ios.h:37,
                 from /usr/include/c++/10/ios:44,
                 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 railroad.cpp:1:
/usr/include/c++/10/bits/streambuf_iterator.h:422:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(std::istreambuf_iterator<_CharT>, std::istreambuf_iterator<_CharT>, const _CharT2&)'
  422 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/10/bits/streambuf_iterator.h:422:5: note:   template argument deduction/substitution failed:
railroad.cpp:22:14: note:   mismatched types 'std::istreambuf_iterator<_CharT>' and 'int'
   22 |    a = find(a) , b = find(b);
      |              ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from railroad.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3894:5: note: candidate: 'template<class _IIter, class _Tp> _IIter std::find(_IIter, _IIter, const _Tp&)'
 3894 |     find(_InputIterator __first, _InputIterator __last,
      |     ^~~~
/usr/include/c++/10/bits/stl_algo.h:3894:5: note:   template argument deduction/substitution failed:
railroad.cpp:22:14: note:   candidate expects 3 arguments, 1 provided
   22 |    a = find(a) , b = find(b);
      |              ^
In file included from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from railroad.cpp:1:
/usr/include/c++/10/pstl/glue_algorithm_defs.h:60:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Tp> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::find(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, const _Tp&)'
   60 | find(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value);
      | ^~~~
/usr/include/c++/10/pstl/glue_algorithm_defs.h:60:1: note:   template argument deduction/substitution failed:
railroad.cpp:22:14: note:   candidate expects 4 arguments, 1 provided
   22 |    a = find(a) , b = find(b);
      |              ^
railroad.cpp:22:28: error: no matching function for call to 'find(int&)'
   22 |    a = find(a) , b = find(b);
      |                            ^
In file included from /usr/include/c++/10/bits/locale_facets.h:48,
                 from /usr/include/c++/10/bits/basic_ios.h:37,
                 from /usr/include/c++/10/ios:44,
                 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 railroad.cpp:1:
/usr/include/c++/10/bits/streambuf_iterator.h:422:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(std::istreambuf_iterator<_CharT>, std::istreambuf_iterator<_CharT>, const _CharT2&)'
  422 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/10/bits/streambuf_iterator.h:422:5: note:   template argument deduction/substitution failed:
railroad.cpp:22:28: note:   mismatched types 'std::istreambuf_iterator<_CharT>' and 'int'
   22 |    a = find(a) , b = find(b);
      |                            ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from railroad.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3894:5: note: candidate: 'template<class _IIter, class _Tp> _IIter std::find(_IIter, _IIter, const _Tp&)'
 3894 |     find(_InputIterator __first, _InputIterator __last,
      |     ^~~~
/usr/include/c++/10/bits/stl_algo.h:3894:5: note:   template argument deduction/substitution failed:
railroad.cpp:22:28: note:   candidate expects 3 arguments, 1 provided
   22 |    a = find(a) , b = find(b);
      |                            ^
In file included from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from railroad.cpp:1:
/usr/include/c++/10/pstl/glue_algorithm_defs.h:60:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Tp> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::find(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, const _Tp&)'
   60 | find(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value);
      | ^~~~
/usr/include/c++/10/pstl/glue_algorithm_defs.h:60:1: note:   template argument deduction/substitution failed:
railroad.cpp:22:28: note:   candidate expects 4 arguments, 1 provided
   22 |    a = find(a) , b = find(b);
      |                            ^
railroad.cpp:24:10: error: invalid types 'int[int]' for array subscript
   24 |    if(siz[a] > siz[b]) swap(a, b);
      |          ^
railroad.cpp:24:19: error: invalid types 'int[int]' for array subscript
   24 |    if(siz[a] > siz[b]) swap(a, b);
      |                   ^
railroad.cpp:25:7: error: invalid types 'int[int]' for array subscript
   25 |    siz[b] += siz[a];
      |       ^
railroad.cpp:25:17: error: invalid types 'int[int]' for array subscript
   25 |    siz[b] += siz[a];
      |                 ^
railroad.cpp:26:7: error: invalid types 'int[int]' for array subscript
   26 |    par[a] = b;
      |       ^
railroad.cpp: At global scope:
railroad.cpp:32:1: error: 'll' does not name a type; did you mean 'all'?
   32 | ll plan_roller_coaster(vector<int> _s, vector<int> _t){
      | ^~
      | all