Compilare: main.cpp: In function 'void bfs(int)': main.cpp:19:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[k].size(); i++){ ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 1; i <= n; i++) ^~~ main.cpp:44:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' out<<sol.size()<<"\n"; ^~~ main.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~