Submission #633462

#	Time	Username	Problem	Language	Result	Execution time	Memory
633462		a_aguilo	Knapsack (NOI18_knapsack)	C++17	12 / 100	1 ms	212 KiB

knapsack

#include<bits/stdc++.h>

using namespace std;

typedef vector<long long int> vi;
typedef vector<vi> vvi;

vi dp;
vi values, weight, freqs;

int S, N;

int main(){
    cin >> S >> N;
    dp = vi(S+1, 0);
    values = vi(N);
    weight = vi(N);
    freqs = vi(N);
    for(int i = 0; i < N; ++i) cin >> values[i] >> weight[i] >> freqs[i];
    unordered_set<int> pos;
    pos.insert(0);
    for(int i = 0; i < N; ++i){
        vector<int> add;
        for(int p: pos){
            for(int reps = 1; reps <= freqs[i]; ++reps){
                int nextW = p + weight[i]*reps;
                if(nextW <= S) {
                        dp[nextW] = max(dp[nextW], dp[p] + values[i]*reps);
                        add.push_back(nextW);
                }
                else break;
            }

        }
        for(int j: add) pos.insert(j);
            add.clear();
    }

    long long int ans = 0;
    for(long long int n: dp) ans = max(ans, n);
    cout << ans << endl;
    return 0;
}

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