Submission #635837

#	Time	Username	Problem	Language	Result	Execution time	Memory
635837		zeroesandones	Knapsack (NOI18_knapsack)	C++17	100 / 100	225 ms	3608 KiB

knapsack

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

typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll, ll> pi;

#define FOR(i, j, k) for (ll i = j; i < (ll) k; ++i)
#define FORD(i, j, k) for (ll i = j; i >= (ll) k; --i)
#define nl "\n"
#define all(x) (x).begin(), (x).end()

#define sc second
#define fr first
#define pb push_back

void solve()
{
    int s, n;
    cin >> s >> n;

    int v[n], w[n], k[n];
    FOR(i, 0, n) {
        cin >> v[i] >> w[i] >> k[i];
        k[i] = min(k[i], s/w[i]);
    }

    ll dp[s + 1] = {};
    FOR(i, 0, n) {
        bool improv = true;
        FOR(j, 0, k[i]) {
            if(!improv)
                continue;
            improv = false;
            FORD(p, s, 0) {
                if(p - w[i] >= 0) {
                    if(dp[p - w[i]] + v[i] > dp[p]) {
                        dp[p] = dp[p - w[i]] + v[i];
                        improv = true;
                    }
                }
            }
        }
    }

    cout << dp[s] << nl;
}

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

    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

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