Submission #1172423

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172423		dbekarys	Knapsack (NOI18_knapsack)	C++20	12 / 100	46 ms	8264 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
#define int long long
const long long inf=1e18;

int dp[1000007];
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie();
    
    int m,n;
    cin>> m>>n;
    bool ok = 0 ;
    if(n == 1) {
        ok = 1 ;
    }
    int a[n+1],b[n+1];
    vector<int>v1,v2,k;
    for(int i=1,count;i<=n;i++){
        cin>> b[i]>>a[i]>>count;
        if(ok) {
            int s = m / a[i] ;
            if(s >= count) {
                cout << b[i] * count ;
            }
            else {
                cout << b[i] * s ;
            }
            return 0;
        }
        k.push_back(count);
        for(int j=0;j<min(count,m);j++){
            v1.push_back(a[i]);
            v2.push_back(b[i]);
        }
    }
    for(int i=0;i<=1000000;i++){
        dp[i]=inf;
    }
    dp[0]=0;
    for(int i=0;i<v1.size();i++){
        for(int j=1000000-v2[i];j>=0;j--){
            dp[j+v2[i]]=min(dp[j]+v1[i],dp[j+v2[i]]);
        }
    }
    for(int i=1000000;i>=0;i--){
        if(dp[i]<=m){
            cout<< i;
            break;
        }
    }
}

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