Time Exceeded
foo.cc: In function 'int main()':
foo.cc:115:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<ed.size();i++)
~^~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务
foo.cc: In function 'int main()':
foo.cc:115:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<ed.size();i++)
~^~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务
