Compilare: main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(i = 0; i < euler.size(); i ++) | ~~^~~~~~~~~~~~~~ main.cpp:64:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(i = 0; i < euler.size(); i ++) | ~~^~~~~~~~~~~~~~