[2016-03-27][HDU][1114][Piggy-Bank]

• 时间:2016-03-27 16:37:56 星期日

• 题目编号:[2016-03-27][HDU][1114][Piggy-Bank]

• 遇到的问题:注意f == e的情况,即dp[0] = 0;

#include <cstring>
#include <cstdio>
#include<algorithm>
using namespace std;
int dp[10000 + 10];
int w[500 + 10],c[500 + 10];
int main(){
        int t;
        scanf("%d",&t);
        while(t--){
                int e,f,n;
                scanf("%d%d%d",&e,&f,&n);
                for(int i = 0;i < n;++i){
                        scanf("%d%d",&w[i],&c[i]);
                }
                memset(dp,0x7f,sizeof(dp));
                dp[0] = 0;
                for(int i = 0;i < n;++i){
                        for(int v = c[i];v <= f - e;++v){
                                dp[v] = min(dp[v] , dp[v - c[i]] + w[i]);
                        }
                }
                if(dp[f - e] == 0x7f7f7f7f)     puts("This is impossible.");
                else printf("The minimum amount of money in the piggy-bank is %d.\n",dp[f - e]);
        }
        return 0;
}

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