完全背包hdu1114

https://vjudge.net/contest/68966#problem/F

初始化就行了；dp【0】=0；

这题还要刚好装满背包，输出时进行判断

#include<map>
#include<set>
#include<list>
#include<cmath>
#include<queue>
#include<stack>
#include<vector>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#define ll long long

using namespace std;

const int N=10005,inf=0x3f3f3f;
int n,v[N],w[N],dp[N];
int main()
{
    int t;
    scanf("%d",&t);
    while(t--){
        int a,b,n,W;
        scanf("%d%d",&a,&b);
        W=b-a;
        memset(dp,inf,sizeof(dp));
        dp[0]=0;
        scanf("%d",&n);
        for(int i=0;i<n;i++)scanf("%d%d",&v[i],&w[i]);
        for(int i=0;i<n;i++)
            for(int j=w[i];j<=W;j++)
               dp[j]=min(dp[j],dp[j-w[i]]+v[i]);
        if(dp[W]>=inf)printf("This is impossible.\n");
        else printf("The minimum amount of money in the piggy-bank is %d.\n",dp[W]);
    }
    return 0;
}