套用两个map一定要多留一个空格
map<string, map<string, int>> m1与map<string, map<string, int> > m1是不一样的
map<string, map<string, int>> m1与map<string, map<string, int> > m1是不一样的
>>就变成右移符号了
#include<iostream>
#include<map>
#include<string>
using namespace std;
map<string, map<string, int> > m1;
int main()
{
int T;
scanf("%d", &T);
while(T--)
{
m1.clear();
int n, m;
string a, b;
scanf("%d", &n);
while(n--)
{
cin >> a >> b >> m;
m1[b][a] += m;
}
map<string, map<string, int> >::iterator it;
map<string, int>::iterator it1;
for( it = m1.begin(); it != m1.end(); it++ )
{
cout << it->first << endl;
for( it1 = it->second.begin(); it1 != it->second.end(); it1++ )
cout << " |----" << it1->first<< "(" << it1->second << ")" << endl;
}
if(T)
puts("");
}
return 0;
}