Submission #218719

#	Time	Username	Problem	Language	Result	Execution time	Memory
218719		quocnguyen1012	Kisik (COCI19_kisik)	C++14	90 / 90	1225 ms	65784 KiB

kisik

#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back

using namespace std;
typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 1e6 + 5;

signed main(void)
{
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #ifdef LOCAL
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  #endif // LOCAL
  int n, k; cin >> n >> k;
  vector<ii> a(n);
  for(auto & it : a){
    cin >> it.se >> it.fi;
  }
  sort(a.begin(), a.end());
  ll res = 1e18, sum = 0;
  multiset<int> se;
  for(auto & it : a){
    se.insert(it.se);
    sum += it.se;
    if(se.size() > k){
      sum -= *se.rbegin();
      se.erase(se.find(*se.rbegin()));
    }
    if(se.size() == k){
      res = min(res, sum * it.fi);
    }
  }
  cout << res;
}

Compilation message (stderr)

kisik.cpp: In function 'int main()':
kisik.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(se.size() > k){
                  ^
kisik.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(se.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