Compilare: main.cpp: In function 'int main()': main.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (i = 2; i <= euler.size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (i = 0; i < parc.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (j = 0; j < euler.size(); j++) | ~~^~~~~~~~~~~~~~