Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:28:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<mu[x.second].size();i++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:28:13: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=0;i<mu[x.second].size();i++) ^~~ main.cpp:34:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' q.pop(); ^