제출 #1076149

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1076149		lmaobruh	Art Exhibition (JOI18_art)	C++14	100 / 100	440 ms	52176 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int long long
#define ii pair<ll, ll>
#define fi first
#define se second
const int N = 5e5+5;
int n;
ii a[N];
map<ll, ll> mp;

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    if (fopen("A.inp", "r")) {
        freopen("A.inp", "r", stdin);
        freopen("A.out", "w", stdout);
    }
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i].fi >> a[i].se;
        mp[a[i].fi] += a[i].se;
    }
    n = 0;
    for (auto &it : mp) a[++n] = it;
    sort(a+1, a+n+1);
    long long ans = 0, mx = 0;
    for (int i = 1; i <= n; ++i) {
        ans = max(ans, mx - a[i].fi + a[i].se);
        ans = max(ans, a[i].se);
        mx = max(mx + a[i].se, a[i].fi + a[i].se);
    }
    cout << ans;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int32_t main()':
art.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen("A.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
art.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("A.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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