Runtime Error
/in/foo.cc: In function 'bool BFS()':
/in/foo.cc:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<s[p].size();i++){
~^~~~~~~~~~~~
/in/foo.cc: In function 'bool BFS()':
/in/foo.cc:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<s[p].size();i++){
~^~~~~~~~~~~~
