Compilare: main.cpp: In function 'void bfsx()': main.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int j=0;j<a[x1].size();j++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'void bfsy()': main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int j=0;j<a[x1].size();j++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:20: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized] 73 | sol[l2]=aux,l2++; | ~~~~~~~^~~~