Submission #1228880

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228880		ghgcdc	Art Exhibition (JOI18_art)	C++17	100 / 100	115 ms	12116 KiB

art

#include<bits/stdc++.h>
using namespace std;
const int N = 5*1e5+1;
struct Art{
    long long a;
    int b;
}v[N];
long long pre[N];
bool cmp(const Art& x, const Art& y){
    return x.a < y.a;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n; cin>>n;
    for(int i = 1; i <= n; ++i)cin>>v[i].a>>v[i].b;
    sort(v+1, v+n+1, cmp);
    memset(pre,0,N);
    for(int i = 1; i <= n; ++i)pre[i + 1] = pre[i] + v[i].b;
    long long ans = -2e18, max_i = -2e18;
    for(int j = 1; j <= n; ++j){
        long long val_i = v[j].a - pre[j];
        max_i = max(max_i, val_i);
        long long val_j = pre[j + 1] - v[j].a;
        ans = max(ans, max_i + val_j);
    }
    cout<<ans<<'\n';
    return 0;
}

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