Submission #1144459

#	Time	Username	Problem	Language	Result	Execution time	Memory
1144459		arafatenok	Art Exhibition (JOI18_art)	C++17	100 / 100	114 ms	12244 KiB

art

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization("unroll-loops")
#pragma ("reroll")
#define skip continue;
#define gold ios_base::sync_with_stdio(false);cin.tie(NULL);
#define xa "\n"
#define int long long
#define all(a) a.begin(), a.end()
#define pb push_back
#define F first
#define S second
using namespace std;

const int mod = 1e9 + 7;
const int N = 1e6 + 7;
const int MAX = 1e9;
const int inf = 1e18;

int gcd(int a, int b) { if (b == 0) return a; else if(a == 0) return b; else return gcd(b, a % b); }
int lcm(int a, int b) { return a / gcd(a, b) * b; }

int pref[N];

void solve() {
    int n;
    cin >> n;
    vector < pair < int, int > > v;
    v.pb({-inf, -inf});
    for(int i = 1; i <= n; i++){
        int a, b;
        cin >> a >> b;
        v.pb({a, b});
    }
    sort(all(v));
    for(int i = 1; i <= n; i++){
        pref[i] = pref[i - 1] + v[i].S;
    }
    int mx = 0;
    int ans = 0;
    for(int r = 1; r <= n; r++){
        mx = max(mx, v[r].F - pref[r - 1]);
        ans = max(ans, pref[r] - v[r].F + mx);
    }
    cout << ans;
}

// p[r] - p[l - 1] - (a[r] - a[l]);
// (p[r] - a[r]) + (a[l] - p[l - 1]);

signed main() {
    gold;
    //freopen("pails.in", "r", stdin);
    //freopen("pails.out", "w", stdout);
    int t = 1;
    int ti = 1;
    //cin >> t;
    while (t--) {
        //cout << "Case " << ti << ": ";
        solve();
        ti++;
    }
}

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