Submission #1341232

#	Time	Username	Problem	Language	Result	Execution time	Memory
1341232		kiengyt	Knapsack (NOI18_knapsack)	C++20	37 / 100	1 ms	344 KiB

knapsack

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

typedef long long ll;

const int S_MAX = 100005; 
ll dp[S_MAX]; 

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int s, n;
    if (!(cin >> s >> n)) return 0;

    for (int i = 0; i <= s; i++) dp[i] = 0;

    for (int i = 0; i < n; i++) {
        int v_i, w_i, k_i;
        cin >> v_i >> w_i >> k_i;
        
        if (w_i > s || k_i <= 0) continue;

        for (int j = 1; k_i > 0; j <<= 1) {
            int num = min(j, k_i);
            ll V = (ll)num * v_i;
            int W = num * w_i;

            if (W <= s) {
                for (int j_s = s; j_s >= W; j_s--) {
                    if (dp[j_s - W] + V > dp[j_s]) {
                        dp[j_s] = dp[j_s - W] + V;
                    }
                }
            }
            k_i -= num;
        }
    }

    ll ans = 0;
    for (int j = 0; j <= s; j++) if (dp[j] > ans) ans = dp[j];
    cout << ans;

    return 0;
}

• Subtask 1: 0 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27