제출 #1109194

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1109194		kh0i	Art Exhibition (JOI18_art)	C++17	100 / 100	171 ms	8324 KiB

art

#include "bits/stdc++.h"
using namespace std;

using ll = long long;
using pii = pair<int, int>;

#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()

const int N = 5e5 + 3;

int n;
pair<ll, ll> x[N];

void solve(){
    cin >> n;
    for(int i = 1; i <= n; ++i)
        cin >> x[i].F >> x[i].S;
    sort(x + 1, x + n + 1);

    ll res = 0, mx = 0, sum = 0;
    for(int i = 1; i <= n; ++i){
        mx = max(mx, x[i].F - sum);
        sum += x[i].S;
        res = max(res, sum - x[i].F + mx);
    }

    cout << res;
}

signed main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    #define task "troll"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }

    int test = 1;
//    cin >> test;
    while(test--)
        solve();

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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