Compilare: main.cpp: In function 'bool Check(int)': main.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < G[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~ main.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int j = 0; j < G[focus].size(); ++j) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (int j = 0; j < G[i].size(); ++j) | ~~^~~~~~~~~~~~~ main.cpp:63:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (int j2 = 0; j2 < G[focus].size(); ++j2) | ~~~^~~~~~~~~~~~~~~~~