제출 #1273794

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1273794		baotoan655	Art Exhibition (JOI18_art)	C++20	0 / 100	1 ms	332 KiB

art

#include <bits/stdc++.h>
#define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
using namespace std;

const int N = 5e5 + 5;
int n;
pair<long long, int> a[N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    file("A") else file("task");
    cin >> n;
    for(int i = 1; i <= n; ++i) cin >> a[i].first >> a[i].second;
    sort(a + 1, a + n + 1, greater<pair<long long, int>>());
    long long ans = 0;
    long long sum = 0;
    long long mn = 1e16;
    for(int i = 1; i <= n; ++i) {
        sum += a[i].second;
        ans = max(ans, sum + a[i].first - mn);
        mn = min(mn, sum - a[i].second + a[i].first);
    }
    cout << ans << '\n';
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:13:5: note: in expansion of macro 'file'
   13 |     file("A") else file("task");
      |     ^~~~
art.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:13:5: note: in expansion of macro 'file'
   13 |     file("A") else file("task");
      |     ^~~~
art.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:13:20: note: in expansion of macro 'file'
   13 |     file("A") else file("task");
      |                    ^~~~
art.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:13:20: note: in expansion of macro 'file'
   13 |     file("A") else file("task");
      |                    ^~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50