Compilare: main.cpp: In function 'int BFS()': main.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = 0; i < G[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:109:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 109 | if ( visited1[x] && visited2[y] || visited1[y] && visited2[x]) | ~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:113:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (i = 0; i <ANS.size(); i++) | ~~^~~~~~~~~~~