Submission #1319282

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319282		chithanhnguyen	Gym Badges (NOI22_gymbadges)	C++20	100 / 100	120 ms	12464 KiB

Main

/*
Author: Nguyen Chi Thanh - High School for the Gifted - VNU.HCM (i2528)
*/
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ull unsigned long long
#define ld long double
#define pii pair<int, int>
#define fi first
#define se second
#define __builtin_popcount __builtin_popcountll
#define all(x) (x).begin(), (x).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(x) ((1ll << (x)))

#define debug(a, l, r) for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n';

struct Gym {
    int cap, gain;

    bool operator < (const Gym &other) const {
        return cap + gain < other.cap + other.gain;
    }
};

const int MAXN = 5e5 + 5;
int n;
Gym a[MAXN];

void init() {
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> a[i].gain;
    for (int i = 1; i <= n; ++i) cin >> a[i].cap;

    sort(a + 1, a + n + 1);
}

void solve() {
    priority_queue<int> pq;
    int exp = 0, gyms = 0;;
    for (int i = 1; i <= n; ++i) {
        if (exp <= a[i].cap) {
            exp += a[i].gain;
            pq.push(a[i].gain);
            ++gyms;
        } else if (!pq.empty() && a[i].gain < pq.top()) {
            exp -= pq.top(); pq.pop();
            exp += a[i].gain; pq.push(a[i].gain);
        }
    }

    cout << gyms;
}

signed main() {
    #ifdef NCTHANH
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);

    init();
    solve();

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 9 / 9
• Subtask 3: 27 / 27
• Subtask 4: 49 / 49