Submission #66740151

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Source Code Expand

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    int n, h, m;
    cin >> n >> h >> m;
    vector<int> a(n + 1), b(n + 1);
    for (int i = 1; i <= n; i++) cin >> a[i] >> b[i];

    auto chmax = [&](int& x, int y) {
        if (y > x) x = y;
    };

    int ans = 0;
    vector<vector<int>> dp(n + 1, vector<int>(h + 1, -1));
    for (int i = 0; i <= h; i++) dp[0][i] = m;
    for (int i = 1; i <= n; i++) {
        for (int j = h - a[i]; j >= 0; j--) {
            chmax(dp[i][j + a[i]], dp[i - 1][j]);
        } 
        for (int j = h; j >= 0; j--) {
            if (dp[i - 1][j] >= b[i]) {
                chmax(dp[i][j], dp[i - 1][j] - b[i]);
            }
        }
        bool ok = false;
        for (int j = h; j >= 0; j--) if (dp[i][j] >= 0) {
            ans = i;
            ok = true;
            break;
        } 
        if (!ok) break;
    }
    cout << ans << '\n';
    return 0;
}

Submission Info

Judge Result