제출 #1198236

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1198236		hitoru	Art Exhibition (JOI18_art)	C++20	100 / 100	111 ms	12116 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define task "D"
#define ll long long
#define fi first
#define se second

const int maxn=5e5+5;

int n;
pair<ll,ll> a[maxn];
ll dp[maxn],ans=0;

int main()
{
    if (fopen(task".INP","r"))
    {
        freopen(task".INP","r",stdin);
        freopen(task".OUT","w",stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin>>n;
    for (int i=1;i<=n;i++)
    {
        cin>>a[i].fi>>a[i].se;
    }
    sort(a+1,a+n+1);
    for (int i=1;i<=n;i++)
    {
        dp[i]=max(dp[i-1]+a[i].se,a[i].se+a[i].fi);
    }
    for (int i=1;i<=n;i++) ans=max(ans,dp[i]-a[i].fi);
    cout<<ans;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
art.cpp:19:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         freopen(task".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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