简简单单

AC code

#include<queue>
#include<math.h>
#include<stdio.h>
#include<iostream>
#include<vector>
#include<iomanip>
#include<string.h>
#include<algorithm>
#include<cmath>
#include<cstdio>
#include<utility>
#include<cstring>
#include<stack>
#include<fstream>
#include<string>
using namespace std;
#define LL long long
const int INF = 0x3f3f3f3f;
const int N = 12010;
const int M = 2010;
int n , m;
int v[N] , w[N];
int f[M];
int main()
{
	cin >> n >> m;
	int c = 0;
	for ( int i = 1 ; i <= n ; i++ )
    {
		int a , b , s;
		cin >> a >> b >> s;
		int k = 1;
		while ( k <= s )
        {
			c++;
			v[c] = a * k;
			w[c] = b * k;
			s -= k;
			k *= 2;
		}
		if ( s > 0 )
        {
			c++;
			v[c] = s * a;
			w[c] = b * s;	
		}
		
    }
	n = c;
	for ( int i = 1 ; i <= n ; i++ )
    {
	    for ( int j = m ; j >= v[i] ; j-- )
	    {
            f[j] = max( f[j] , f[ j - v[i] ] + w[i] );
        }
    }
	cout << f[m];
	return 0;
}

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