Compilare: main.cpp: In function 'int main()': main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=3;i<=euler.size()-1;i++) | ~^~~~~~~~~~~~~~~~ main.cpp:51:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=1;i+(1<<j)-1<=euler.size()-1;i++) | ~~~~~~~~~~^~~~~~~~~~~~~~~~