Submission #1147048

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147048		Shadow1	Art Exhibition (JOI18_art)	C++20	100 / 100	116 ms	12112 KiB

art

// Programmer: Shadow1

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using str = string; // yay python!

#define i64 int64_t
#define show(x) cerr << (#x) << " = " << (x) << '\n';
#define output_vector(v) for(auto &x : v){cout << x << ' ';}cout << '\n';
#define output_pairvector(v) for(auto &x : v){cout << x.first << " " << x.second << '\n';}
#define read_vector(v) for(auto &x : v){cin >> x;}
#define vt vector
#define prq priority_queue
#define pb push_back
#define eb emplace_back
#define pii pair<int,int>
#define fir first
#define sec second
#define sz(x) ll(x.size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int long long
#define discretize(x) sort(x.begin(), x.end()); x.erase(unique(x.begin(), x.end()), x.end());

// 
const int INF = 1e15;
void solve() {
    int n;
    cin >> n;
    vector<pii> a(n+1);
    for(int i=1; i<=n; ++i)
        cin >> a[i].fir >> a[i].sec;
    sort(all(a));
    vector<int> ps(n+1);
    for(int i=1; i<=n; ++i) {
        ps[i] = ps[i-1] + a[i].sec;
    }
    int maxx = -INF, ans = -INF;
    for(int i=0; i<=n; ++i) {
        maxx = max(maxx, a[i].fir - ps[i-1]);
        ans = max(ans, ps[i] - a[i].fir + maxx);
    }
    cout << ans << '\n';
}



// CHECK YOUR OVERFLOWS!!!! 
signed main() {
    // freopen("output.txt", "w", stdout);
    // freopen("input.txt", "r", stdin);
    ios::sync_with_stdio(false);
    cin.tie(NULL); 
    int T = 1;
    // cin >> T;
    for(int tc = 1; tc <= T; ++tc) {
        // cout << "Case #" << tc << ": ";
        solve();
    }

    return 0;
}

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