Submission #888909

#	Time	Username	Problem	Language	Result	Execution time	Memory
888909		Perl32	Knapsack (NOI18_knapsack)	C++14	0 / 100	1 ms	348 KiB

knapsack

//I wrote this code 4 u <3
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif

const int INF = (int) 1e9 + 1e3;

const int maxN = 2024;
ll dp[maxN];
vector<pair<int, int>> srt[maxN];

signed main(int32_t argc, char *argv[]) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int W, n;
    cin >> W >> n;
    dp[0] = 0;
    for (int i = 0; i < n; ++i) {
        int s, w, k;
        cin >> s >> w >> k;
        k = min(s / w, k);
        srt[w].emplace_back(s, k);
    }
    for (auto &x : srt) {
        sort(x.rbegin(), x.rend());
    }
    fill(dp + 1, dp + maxN, -INF);
    dp[0] = 0;
    for (int i = 1; i <= W; ++i) {
        for (auto [s, k] : srt[i]) {
            for (int l = W; l >= 0; --l) {
                for (int j = 1; j <= k; ++j) {
                    if (l - k * j >= 0) {
                        dp[l] = max(dp[l], dp[l - k * j] + 1ll * s * j);
                    }
                }
            }
        }
    }
    ll mx = 0;
    for (int i = 0; i < maxN; ++i) {
        mx = max(mx, dp[i]);
    }
    cout << mx;
}
/*

 */

Compilation message (stderr)

knapsack.cpp: In function 'int main(int32_t, char**)':
knapsack.cpp:38:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |         for (auto [s, k] : srt[i]) {
      |                   ^

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