/in/foo.cc: In function 'int main()':
/in/foo.cc:70:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for(int i=0;i<jinghao.size();i++)
             ~^~~~~~~~~~~~~~~
/in/foo.cc: In function 'void dfs(int, int, int, int)':
/in/foo.cc:155:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int tj=0;tj<110;tj++)
  ^~~
/in/foo.cc:158:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   l=true;
   ^