제출 #248890

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
248890		rocks03	Art Exhibition (JOI18_art)	C++14	0 / 100	3 ms	640 KiB

art

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<ll,ll>
#define ff first
#define ss second
#define pb push_back

main(){
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int N; cin >> N;
    vector<pii> v(N);
    for(int i = 0; i < N; i++) cin >> v[i].ff >> v[i].ss;
    sort(v.begin(), v.end());
    ll ans = v[0].ss;
    set<pii> s; s.insert({v[0].ss+v[0].ff, 0});
    ll sum = v[0].ss;
    for(int i = 1; i < N; i++){
        pii best = *s.rbegin();
        ans = max(ans, best.ff - v[i].ff + v[i].ss);
        sum += v[i].ss;
        s.insert({sum+v[0].ff, 0});
        s.insert({best.ff - v[i].ff + v[i].ss, best.ss});
    }
    cout << ans;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp:9:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
art.cpp: In function 'int main()':
art.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("input.txt", "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("output.txt", "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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