gym-101350M
题意:给你一堆货币汇率,再给你一堆货币,算下值多少钱;
思路:直接map搞定;
#include<iostream>
#include<algorithm>
#include<cstring>
#include<cstdio>
#include<map>
using namespace std;
int main()
{
int n,c;
int t;
char s[];
double ans,temp;
scanf("%d",&t);
while(t--)
{
map<string,double>money;
ans=;
scanf("%d%d",&c,&n);
for(int i=;i<c;i++)
{
scanf("%s",s);
scanf("%lf",&temp);
money[s]=temp;
}
money["JD"]=;
for(int i=;i<n;i++)
{
scanf("%lf",&temp);
scanf("%s",s);
ans=ans+money[s]*temp;
}
printf("%.6lf\n",ans);
}
return ;
}
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