Submission #801942

#	Time	Username	Problem	Language	Result	Execution time	Memory
801942		Trisanu_Das	Kisik (COCI19_kisik)	C++17	90 / 90	974 ms	65504 KiB

kisik

#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
 
const int maxn = 1e6 + 10;
const ll inf = 1e18;
 
pair<int, int> a[maxn];
 
int main(){
	ios_base::sync_with_stdio(false);
	int n, k;
	cin >> n >> k;
	for (int i = 0; i < n; i++)
		cin >> a[i].second >> a[i].first;
	sort(a, a + n);
	multiset<int> s;
	ll answer = inf;
	ll sum = 0;
	for (int i = 0; i < n; i++){
		s.insert(a[i].second);
		sum += a[i].second;
		if (s.size() > k){
			auto it = s.end();
			it --;
			sum -= *it;
			s.erase(it);
		}
		if (s.size() == k)
			answer = min(answer, 1ll * sum * a[i].first);
	}
	cout << answer << endl;
}

Compilation message (stderr)

kisik.cpp: In function 'int main()':
kisik.cpp:24:16: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   24 |   if (s.size() > k){
      |       ~~~~~~~~~^~~
kisik.cpp:30:16: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |   if (s.size() == k)
      |       ~~~~~~~~~^~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10