Compilare: main.cpp: In function 'void precalc()': main.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int j = 0; j < p.size() && i * p[j] < NMAX; j++) { | ~~^~~~~~~~~~ main.cpp: In function 'bool prime(int, int)': main.cpp:67:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | while (i < fact[x].size() && j < fact[y].size()) { | ~~^~~~~~~~~~~~~~~~ main.cpp:67:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | while (i < fact[x].size() && j < fact[y].size()) { | ~~^~~~~~~~~~~~~~~~