Compilare: main.cpp: In lambda function: main.cpp:20:27: 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 < solG[u].size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool dfs(int)': main.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int i = 0; i + 1 < odds.size(); i += 2) { | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (int i = 0; i + 1 < odds.size(); i += 2) { | ~~~~~~^~~~~~~~~~~~~