Submission #1020185

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020185		ArthuroWich	Knapsack (NOI18_knapsack)	C++17	73 / 100	1089 ms	1368 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
#define int long long int
void solve() {
    int s, n;
    cin >> s >> n;
    vector<int> dp(s+1, -1);
    dp[0] = 0;
    for (int i = 0; i < n; i++) {
        int v, w, k, l;
        cin >> v >> w >> k;
        while(k > 0) {
            l = log2(k);
            if (l != 0) {
                k -= (1<<l)-1;
            } else {
                k--;
                l++;
            }
            for (int x = 0; x < l; x++) {
                for (int j = s; j >= 0; j--) {
                    if (j-(1LL<<x)*w < 0) {
                        break;
                    }
                    if (dp[j-(1LL<<x)*w] != -1) {
                        dp[j] = max(dp[j], dp[j-(1LL<<x)*w]+(1LL<<x)*v);
                    } 
                }
            }
        }
    }
    int ans = 0;
    for (int i : dp) {
        ans = max(ans, i);
    }
    cout << ans << endl;
}
int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    t = 1;
    while(t--) {
        solve();
    }
}

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