Submission #973206

#	Time	Username	Problem	Language	Result	Execution time	Memory
973206		SeenSiravit	Knapsack (NOI18_knapsack)	C++14	29 / 100	2 ms	348 KiB

knapsack

#include<bits/stdc++.h>
#define ll long long

using namespace std;

const int mxN = 1e5 + 5 , mxS = 2000 + 5;
int n,s;
ll v[mxN];
int w[mxN] , k[mxN]; 
ll  mem[mxS];

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

    cin>> s >> n;

    for(int i=1;i<=n;i++) cin>> v[i] >> w[i] >> k[i] , k[i] = min(k[i] , s/w[i]);

    for(int i=1;i<=n;i++){

        vector<pair<ll,int>> dp(s+1 , {0,0});

        for(int cap=1;cap<=s;cap++){
            dp[cap] = {mem[cap] , 0};

            if(cap >= w[i]){
                int l = cap - w[i];
                int cnt = min(k[i] , dp[l].second + 1);
                int rm = cap - w[i] * cnt;

                pair<ll,int> candidate = {mem[rm] + v[i]*cnt , cnt};

                if(candidate.first > dp[cap].first){
                    dp[cap] = candidate;
                }
            }
        }

        for(int cap=1;cap<=s;cap++) mem[cap] = dp[cap].first;
    }

    cout<< mem[s];

    return 0;
}

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