Submission #1267256

#	Time	Username	Problem	Language	Result	Execution time	Memory
1267256		khoad	Knapsack (NOI18_knapsack)	C++20	17 / 100	1 ms	328 KiB

knapsack

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

#define endl '\n'
#define inf32 ((int)1e9 + 7)
#define inf64 ((long long)1e18 + 7)
#define MASK32(x) (1 << (x))
#define MASK64(x) (1ll << (x))
#define BIT(mask, i) (((mask) >> (i)) & 1)
#define all(a) begin(a), end(a)
#define isz(a) ((int)a.size())

const int N = 5e6 + 1;

struct Item {
    long long v;
    int w;
} a[N];
long long dp[N];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, W;
    cin >> W >> n;
    int m = 0;
    for(int i = 1; i <= n; ++i) {
        long long v;
        int w, k;
        cin >> v >> w >> k;
        int cnt = 1;
        while(cnt * 2 <= k && w * cnt <= W) {
            a[++m] = {v * cnt, w * cnt};
            cnt <<= 1;
        }
        cnt >>= 1;
        cnt = k - cnt;
        a[++m] = {v * cnt, w * cnt};
    }
    n = m;
    for(int i = 1; i <= n; ++i)
        for(int w = W; w >= a[i].w; --w) dp[w] = max(dp[w], dp[w - a[i].w] + a[i].v);
    cout << dp[W];

    return 0;
}

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