Submission #52144

#	Time	Username	Problem	Language	Result	Execution time	Memory
52144		evpipis	Art Exhibition (JOI18_art)	C++14	100 / 100	341 ms	230984 KiB

art

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

const int len = 5e5+5;
const ll inf = 1e17;
pair<ll, ll> arr[len];
ll pref[len];

int main(){
    int n;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++)
        scanf("%lld %lld", &arr[i].fi, &arr[i].se);
    sort(arr+1, arr+1+n);

    for (int i = 1; i <= n; i++)
        pref[i] = arr[i].se + pref[i-1];

    ll ans = 0, mx = -inf;
    for (int i = n; i >= 1; i--){
        mx = max(mx, pref[i]-arr[i].fi);
        ans = max(ans, mx + arr[i].fi-pref[i-1]);
    }

    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
art.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld %lld", &arr[i].fi, &arr[i].se);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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