제출 #1112589

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1112589		guagua0407	Potatoes and fertilizers (LMIO19_bulves)	C++17	30 / 100	114 ms	10632 KiB

bulves

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

int main() {_
    int n;
    cin>>n;
    vector<ll> dif(n+1);
    for(int i=1;i<=n;i++){
        int a,b;
        cin>>a>>b;
        dif[i]=dif[i-1]+a-b;
    }
    priority_queue<ll> pq;
    pq.push(0);
    ll ans=0;
    for(int i=1;i<=n;i++){
        if(dif[i]<0){
            ans-=dif[i];
            dif[i]=0;
        }
        pq.push(dif[i]);
        if(pq.top()>dif[i]){
            pq.push(dif[i]);
            ans+=pq.top()-dif[i];
            pq.pop();
        }
    }
    int cnt=1;
    while(pq.top()>dif[n]){
        int r=pq.top();
        pq.pop();
        ans+=1ll*cnt*(r-max(dif[n],pq.top()));
        cnt++;
    }
    cout<<ans<<'\n';
    return 0;
}
//maybe its multiset not set

컴파일 시 표준 에러 (stderr) 메시지

bulves.cpp: In function 'void setIO(std::string)':
bulves.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bulves.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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