Submission #1229041

#	Time	Username	Problem	Language	Result	Execution time	Memory
1229041		kokokai	Art Exhibition (JOI18_art)	C++20	100 / 100	171 ms	12104 KiB

art

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

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
    if(fopen("text.inp","r")){
        freopen("text.inp","r",stdin);
        //freopen("text.out","w",stdout);
    }
    ll n;
    cin>>n;
    vector<pair<ll,ll>> a(n+1);
    vector<ll> pre(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i].fi>>a[i].se;
    }
    sort(a.begin()+1,a.end());
    //max -pre[l-1]+a[l]
    ll mx=-2e18;
    ll ans=-2e18;
    for(int i=1;i<=n;i++){
        pre[i]=pre[i-1]+a[i].se;
        mx=max(mx,-pre[i-1]+a[i].fi);
        ans=max(ans,pre[i]-a[i].fi+mx);

    }
    cout<<ans<<'\n';
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen("text.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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