Compilare: main.cpp: In function 'int main()': main.cpp:42:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i=0; i<=n+1; i++) ^~~ main.cpp:44:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' while ( !q.empty() ) { ^~~~~