/in/foo.cc: In function 'int spfa()':
/in/foo.cc:43:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
     else q.push_back(to); ll[to]=1;}
     ^~~~
/in/foo.cc:43:27: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
     else q.push_back(to); ll[to]=1;}
                           ^~