제출 #254500

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
254500	2020-07-30 06:54:31	nandonathaniel	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	208 ms	15216 KiB

bulves

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#include<bits/stdc++.h>
using namespace std;
const int MAXN=5e5+5;
long long pref[MAXN];
int main(){
  ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
  int n,a,b;
  long long ans=0;
  cin >> n;
  for(int i=1;i<=n;i++){
    cin >> a >> b;
    pref[i]=pref[i-1]+a-b;
  }
  for(int i=1;i<=n;i++){
    if(pref[i]>pref[n]){
      ans+=(pref[i]-pref[n]);
      pref[i]=pref[n];
    }
    else if(pref[i]<0){
      ans+=(-pref[i]);
      pref[i]=0;
    }
  }
  //make pref non decreasing -> Classic Slope Trick CF713C
  priority_queue<long long> PQ;
  for(int i=1;i<=n;i++){
    PQ.push(pref[i]);PQ.push(pref[i]);
    ans+=(PQ.top()-pref[i]);
    PQ.pop();
 
 
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• Subtask 2: 10 / 10
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• Subtask 5: 36 / 36