Submission #1218741

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218741		pauloaph	Knapsack (NOI18_knapsack)	C++20	73 / 100	1101 ms	156996 KiB

knapsack

#include<iostream>
#include<algorithm>
#include <cmath>
using namespace std;

#define NMAX 10000000

int main(){

    int C;
    int n;

    cin >> C >> n;

    long long v, w, b;
    long long NW[NMAX], NV[NMAX];

    long long idx = 0;
    
    for(int i = 0; i < n; i++){
        int x = 1;
        cin >> v >> w >> b;
        while(b > x){
            b -= x;
            NW[idx] = (x * w);
            NV[idx] = (x * v);
            idx++;
            x = x << 1;
        }
        NW[idx] = (w * b);
        NV[idx] = (v * b);
        idx++;
    }

    long long dp[2][C+1];
    int prev = 0, act = 1;
    // caso base : quando nao temos mais itens
    for ( int c = 0; c <= C; c++ )
        dp[prev][c] = 0;


    for(int i = idx - 1; i >= 0; i-- ){
        for (int c = 0; c <= C; c++ ){
            dp[act][c] = dp[prev][c];
            if(NW[i] <= c ) {
                dp[act][c] = max( dp[act][c], dp[prev][c - NW[i]] + NV[i] );
            }
        }
        swap( act, prev );
    }
      
   cout << dp[prev][C] << endl;
   return 0;
}

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