제출 #1281580

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1281580		deh	Art Exhibition (JOI18_art)	C++20	100 / 100	132 ms	12108 KiB

art

#include <bits/stdc++.h>
#define ll long long
#define f first
#define s second
const ll mod = 1000000007;
using namespace std;
ll pre[500005],n;
pair<ll,ll>a[500005];
void solve(){
    cin >> n;
    for(int i = 1;i <= n;i++)cin >> a[i].f >> a[i].s;
    sort(a+1,a+n+1);
    for(int i = 1;i <= n;i++){
        pre[i] = pre[i-1] + max(a[i].s,1LL*0);
    }
    ll cur = -1e18,res = -1e18;
    for(int i = 1;i <= n;i++){
        cur = max(cur,a[i].f-pre[i-1]);
        res = max(res,pre[i]-a[i].f+cur);
    }
    cout << res;
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    if(fopen("deH.INP","r")){
        freopen("deH.INP","r",stdin);
        freopen("deH.OUT","w",stdout);
    }
    int ts = 1;//cin >> ts;
    while(ts--)solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen("deH.INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
art.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen("deH.OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50