九度题目1454：Piggy-Bank

#include <stdio.h>#define INF 0x7fffffffint min(int a,int b){return a<b?a:b;}struct E{int w;int v;}list[501];int dp[10001];int main(){int T;scanf("%d",&T);while(T--){int s,tmp;scanf("%d%d",&tmp,&s);s-=tmp;int n;scanf("%d",&n);for(int i=1;i<=n;i++){scanf("%d%d",&list[i].v,&list[i].w);}for(int i=0;i<=s;i++){dp[i]=INF;}dp[0]=0;for(int i=1;i<=n;i++){for(int j=list[i].w;j<=s;j++){if(dp[j-list[i].w]!=INF)dp[j]=min(dp[j],dp[j-list[i].w]+list[i].v);}}if(dp[s]!=INF)printf("The minimum amount of money in the piggy-bank is %d.\n",dp[s]);elseputs("This is impossible.");}return 0;}

参考：王道