Submission #236912

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
236912	2020-06-03 19:00:31	Benq	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	595 ms	15368 KiB

bulves

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int N;
ll fst = 0; // value of DP function at 0
priority_queue<ll> points; // points where DP function changes slope
int main() {
  cin >> N;
  vector<ll> dif(N+1);
  for (int i = 1; i <= N; ++i) {
    int a,b; cin >> a >> b;
    dif[i] = a-b+dif[i-1];
  }
  assert(dif[N] >= 0);
  for (int i = 1; i < N; ++i) {
    if (dif[i] < 0) fst -= dif[i], dif[i] = 0;
    fst += dif[i];
    points.push(dif[i]); points.push(dif[i]);
    points.pop();
  }
  while (points.size()) {
    ll a = points.top(); points.pop();
    fst -= min(a,dif[N]);
  }
  cout << fst << "\n";
}
 
 
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• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36