Submission #682892

#	Time	Username	Problem	Language	Result	Execution time	Memory
682892		matu	Knapsack (NOI18_knapsack)	C++14	73 / 100	1067 ms	1492 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 1, S = 2e3+ 1;
int n, s;
//vector<vector<long long>> dp(N, vector<long long>(S));
vector<long long> dp1(S), dp2(S);
vector<int> h(N), w(N), k(N);
int main(){
    
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> s >> n;

    for(int i = 1; i <= n; i++){
        cin >> w[i] >> h[i] >> k[i];
    }

    long long pra = h[1], car = w[1];

    while(k[1] && pra <= s){
        dp1[pra] = car;
        pra += h[1];
        car += w[1];
        k[1]--;
    }

    for(int i = 2; i <= n; i++){
        for(int x = 1; x <= s; x++){
            dp2[x] = max(dp2[x], dp1[x]);
            long long acum = h[i], pr = w[i], zaz = k[i];
            while(acum <= s && zaz){
                if(x >= acum && dp2[x] < dp1[x - acum] + pr){
                    dp2[x] = dp1[x - acum] + pr;
                }
                acum += h[i];
                pr += w[i];
                zaz--;
            }
        }
        swap(dp2, dp1);
    }
    long long ans = 0;
    for(int i = 1; i <= s; i++){
        ans = max(ans, dp1[i]);
    }
    cout << ans;
}

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