hdu2126 Buy the souvenirs（01背包变化）

hdu2126

分析

题目

代码

#include <iostream>
#include <cstring>
#include <ctime>
#include <fstream>
#include <cstdlib>
#include <algorithm>

using namespace std;

int dp[40][2];

int main()
{
int t;
scanf("%d",&t);
while(t--)
{
int n,m;
scanf("%d %d",&n,&m);
for(int i=0; i<=m; i++)
{
dp[i][1]=1;
dp[i][0]=0;
}

for(int i=0; i<n; i++)
{
int money;
scanf("%d",&money);
for(int j=m; j>=money; j--)
{
if(dp[j][0]==dp[j-money][0]+1)
{
dp[j][1]=dp[j][1]+dp[j-money][1];
}
else if(dp[j][0]<dp[j-money][0]+1)
{
dp[j][0]=dp[j-money][0]+1;
dp[j][1]=dp[j-money][1];
}
}
}

if(dp[m][0]!=0)
printf("You have %d selection(s) to buy with %d kind(s) of souvenirs.\n",dp[m][1],dp[m][0]);
else
printf("Sorry, you can't buy anything.\n");

}

return 0;
}