Compilare: main.cpp: In function 'bool isprim(int, int)': main.cpp:23:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while(l<ciur[a1].size() && j<ciur[b].size()) | ~^~~~~~~~~~~~~~~~ main.cpp:23:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while(l<ciur[a1].size() && j<ciur[b].size()) | ~^~~~~~~~~~~~~~~