Submission #875971

#	Time	Username	Problem	Language	Result	Execution time	Memory
875971		andro	Knapsack (NOI18_knapsack)	C++14	73 / 100	146 ms	262144 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int S,n;
    cin>>S>>n;
    int V[n+1];
    int W[n+1];
    int K[n+1];
    for(int i=1;i<=n;i++)cin>>V[i]>>W[i]>>K[i];
    if(n==1){
        cout<<min(K[1],S/W[1])*V[1];
        return 0;
    }
    int ok=1;
    for(int i=1;i<=n;i++)if(K[i]!=1)ok=0;
    /*
    if(ok){
        int dp[n+1][S+1];
        for(int i=0;i<=n;i++)for(int j=0;j<=S;j++)dp[i][j]=0;
        for(int i=1;i<=n;i++){
            for(int j=0;j<=S;j++)dp[i][j]=dp[i-1][j];
            for(int j=W[i];j<=S;j++){
                dp[i][j]=max(dp[i][j],dp[i-1][j-W[i]]+V[i]);
            }
        }
        int ans=0;
        for(int i=1;i<=S;i++){
            ans=max(ans,dp[n][i]);
        }
        cout<<ans;
        return 0;
    }*/
    int dp[n+1][S+1];
    for(int i=0;i<=n;i++)for(int j=0;j<=S;j++)dp[i][j]=0;
    for(int i=1;i<=n;i++){
        for(int j=0;j<=S;j++)dp[i][j]=dp[i-1][j];
        for(int j=W[i];j<=S;j++){
            for(int k=1;k<=K[i];k++){
                if(j-k*W[i]<0)break;
                dp[i][j]=max(dp[i][j],dp[i-1][j-k*W[i]]+k*V[i]);
            }
        }
    }
    int ans=0;
    for(int i=1;i<=S;i++){
        ans=max(ans,dp[n][i]);
    }
    cout<<ans;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:17:9: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
   17 |     int ok=1;
      |         ^~

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