Submission #1049938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049938		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	349 ms	28624 KiB

art

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
int main() {
    int n;
    cin >> n;
    pair<long long, long long> a[n];long long b[n], c[n], mx=-INT64_MAX, mj=0, mnx;
    for(int i=0; i<n; i++){
        cin >> a[i].f >> a[i].s;
    }
    sort(a, a+n);
    b[0]=a[0].s-a[0].f;
    for(int i=1; i<n ;i++){
        b[i]=b[i-1]-a[i].f+a[i].s+a[i-1].f;
    }
    c[0]=a[0].f;
    for(int i=1; i<n;i++){
        c[i]=c[i-1]-a[i-1].f+a[i].f-a[i-1].s;
    }
    for(int i=1; i<n;i++){
        c[i]=max(c[i-1],c[i]);
    }
    for(int i=0; i<n; i++){
        mx=max(mx, c[i]+b[i]);
    }
    cout << mx;
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:8:74: warning: unused variable 'mj' [-Wunused-variable]
    8 |     pair<long long, long long> a[n];long long b[n], c[n], mx=-INT64_MAX, mj=0, mnx;
      |                                                                          ^~
art.cpp:8:80: warning: unused variable 'mnx' [-Wunused-variable]
    8 |     pair<long long, long long> a[n];long long b[n], c[n], mx=-INT64_MAX, mj=0, mnx;
      |                                                                                ^~~

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