Language: C++

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <complex>
#include <cmath>
#include <limits>
#include <cfloat>
#include <climits>
#include <ctime>
#include <cassert>
#include <numeric>
#include <fstream>
#include <functional>
#include <bitset>
#define chmin(a, b) ((a) = min((a), (b)))
#define chmax(a, b) ((a) = max((a), (b)))
#define fs first
#define sc second
#define eb emplace_back
using namespace std;

#define int long long

typedef long long ll;
typedef pair<int, int> P;
typedef tuple<int, int, int> T;

const ll MOD = 1e9 + 7;
const ll INF = 1e18;
const double pi = acos(-1);
const double eps = 1e-10;

int dx[] = {1, 0, -1, 0};
int dy[] = {0, -1, 0, 1};

signed main(){
    int n; cin>>n;
    vector<vector<int>> G(100010);
    for(int i=0; i<n; i++){
        int x, y; cin>>x>>y;
        G[x].emplace_back(y);
    }

    set<int> st;

    for(int i=0; i<100005; i++){
        if(G[i].size() < 2) continue;

        for(int j=0; j<G[i].size(); j++){
            st.insert(G[i][j]);
        }
    }

    ll ans = 0;
    for(int i=0; i<100005; i++){
        if(G[i].size() == 0) continue;
        ans += max(0, (int)((int)st.size() - (int)G[i].size()));
    }

    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:68:19: error: no matching function for call to 'max(int, long long int)'
   68 |         ans += max(0, (int)((int)st.size() - (int)G[i].size()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:68:19: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   68 |         ans += max(0, (int)((int)st.size() - (int)G[i].size()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:12:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:68:19: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   68 |         ans += max(0, (int)((int)st.size() - (int)G[i].size()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~