要求：統計各個產地生產的各種水果數目。

Sample Input

1
5
apple shandong 3
pineapple guangdong 1
sugarcane guangdong 1
pineapple guangdong 3
pineapple guangdong 1

Sample Output

guangdong
   |----pineapple(5)
   |----sugarcane(1)
shandong
   |----apple(3)

方法：二維map 

二維map定義時最後一個> >中間必須有空格！！！！！！

兩個string對應的int：map<string,map<string,int> >ans;

二維map對應的迭代器：map<string,map<string,int> >::iterator it;

遍歷的for迴圈：for(it=ans.begin();it!=ans.end();it++) //一定要用!=而不能用<

#include<stdio.h>
#include<iostream>
#include<map>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
 int i,j,t,n,num;
 string s1,s2;
 scanf("%d",&t);
 while(t--)
 {
  map<string,map<string,int> >ans;
  scanf("%d",&n);
  for(i=0;i<n;i++)
  {
   cin>>s1>>s2>>num;
   ans[s2][s1]+=num;	
  }
  map<string,map<string,int> >::iterator it;
  
  for(it=ans.begin();it!=ans.end();it++)
  {
  	cout<<it->first<<endl;
    map<string,int>::iterator it_2;
	for(it_2=it->second.begin();it_2!=it->second.end();it_2++)
	 cout<<"   |----"<<it_2->first<<'('<<it_2->second<<')'<<endl;
  }
  if(t) cout<<endl;
 }
}