Submission #957180

#	Time	Username	Problem	Language	Result	Execution time	Memory
957180		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	155 ms	21076 KiB

art

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>

const ll N = 500069;
const ll mod = 1e9 + 7;

int tc;
ll n;
pll a[N];

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    ll i, j;
    
    cin >> n;

    // fi = size
    // se = value
    for(i = 1; i <= n; i++)
    {
        cin >> a[i].fi >> a[i].se;
    }
    sort(a+1, a+n+1);

    ll ans = 0, mn = 1e18, sm = 0;
    for(i = 1; i <= n; i++)
    {
        mn = min(mn, sm - a[i].fi);
        sm += a[i].se;
        ans = max(ans, sm - a[i].fi - mn);
    }

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

/*
1 <= l <= r <= n
pref[i] = a[1].se + ... + a[i].se
a[] = a[].fi
result(l, r)    = (pref[r] - pref[l-1]) - (a[r] - a[l])
                = pref[r] - pref[l-1] - a[r] + a[l]
                = pref[r] - a[r] - pref[l-1] + a[l]
                = pref[r] - a[r] - (pref[l-1] - a[l])        
*/

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:21:11: warning: unused variable 'j' [-Wunused-variable]
   21 |     ll i, j;
      |           ^

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