/in/foo.cc: In function 'int main()':
/in/foo.cc:114:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i = 0; i < m; i++)
     ^~~
/in/foo.cc:116:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  sort(edge, edge + m);
  ^~~~