Compilare: main.cpp: In function 'void euler(int&, int)': main.cpp:21:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i = 0; i < v[x].size(); ++i) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:65:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int j = 0; j < ans[i].size(); j++) | ~~^~~~~~~~~~~~~~~