# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1228876 | nguthianmangcay | Art Exhibition (JOI18_art) | C++20 | 0 ms | 0 KiB |
#include<bits/stdc++.h>
using namespace std;
const int N=5e5+3;
const long long inf=LLONG_MIN;
#define ll long long
#define fi first
#define se second
#define pi pair
pair<ll,ll>a[N];
int64_t main(){
cin.tie(0)->sync_with_stdio(0);
int n;
cin>>n;
for(int i=1;i<=n;i++){
cin>>a[i].fi>>a[i].se;
}
sort(a+1,a+1+n);
ll ma=-inf;
ll tmp=a[1].fi;
for(int i=1;i<=n;i++){
ma=max(ma,tmp+a[i].se-a[i].fi);
tmp=max(tmp+a[i].se,a[i].fi+a[i].se);
}
cout<<ma;
}