Compilare: main.cpp: In function 'void bfs(int, int, std::pair<bool, bool>&)': main.cpp:24:10: warning: unused variable 'sw' [-Wunused-variable] bool sw = 0 ; ^~ main.cpp: In function 'int main()': main.cpp:93:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for ( i = 1 ; i <= n ;++ i ) ^~~ main.cpp:103:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' bool sw = 1 ; ^~~~