Submission #1218172

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218172		shuvo_06	Knapsack (NOI18_knapsack)	C++20	73 / 100	160 ms	327680 KiB

knapsack

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

#define inf 1e15

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    #ifdef SUBLIME
        freopen("inputf.in", "r", stdin);
        freopen("outputf.out", "w", stdout);
        freopen("error.txt", "w", stderr);
    #endif

    int n, w;
    cin >> w >> n;
    vector <pair <long long int, long long int>> obj;
    for (int i = 0; i < n; i++) {
        long long int wt, val, copy;
        cin >> val >> wt >> copy;
        for (long long int p = 1; copy; p <<= 1) {
            long long int take = min(p, copy);
            obj.push_back({take * val, take * wt});
            copy -= take;
        }
    }
    n = obj.size();

    vector <vector <long long int>> dp(n + 1, vector <long long int> (w + 1));
    for (int no = 1; no <= n; no++) {
        auto [val, wt] = obj[no - 1];
        for (int rw = 0; rw <= w; rw++) {
            dp[no][rw] = dp[no - 1][rw];
            if (rw >= wt)
                dp[no][rw] = max(dp[no][rw], dp[no - 1][rw - wt] + val);
        }
    }

    cout << *max_element(dp[n].begin(), dp[n].end());
    return 0;
}

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