Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
    long n, m; cin >> n >> m;
    vector<pair<long long, long long>>data(n); //2個1セットの配列を用意
    long long a, b;
    for(int i=0;i<n;i++){
        cin >> a >> b;
        data[i] = make_pair(a, b); //各入力を一組として扱う
    }
    sort(data.begin(), data.end());

    long long ans = 0;
    for(int i=0;i<n;i++){
        ans += data[i].first * min(data[i].second, m);
        m -= min(data[i].second, m);
        if(m==0){
            break;
        }
    }
    cout << ans << endl;
}

//long型及びlong long型にしないとACされない
//sampleの3つ目で変な数値が出てくるので注意

Compiler output:
a.cc: In function 'int main()':
a.cc:16:35: error: no matching function for call to 'min(long long int&, long int&)'
   16 |         ans += data[i].first * min(data[i].second, m);
      |                                ~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:16:35: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
   16 |         ans += data[i].first * min(data[i].second, m);
      |                                ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:16:35: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   16 |         ans += data[i].first * min(data[i].second, m);
      |                                ~~~^~~~~~~~~~~~~~~~~~~
a.cc:17:17: error: no matching function for call to 'min(long long int&, long int&)'
   17 |         m -= min(data[i].second, m);
      |              ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:17:17: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
   17 |         m -= min(data[i].second, m);
      |              ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:17:17: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   17 |         m -= min(data[i].second, m);
      |              ~~~^~~~~~~~~~~~~~~~~~~