Compilare: main.cpp: In function 'bool PairUp(int)': main.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i = 0;i < edge[nod].size();i++) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0;i < edge[nod].size();i++) { | ~~^~~~~~~~~~~~~~~~~~