Compilare: main.cpp: In function 'void gen_num()': main.cpp:26:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long unsigned int' [-Wsign-compare] 26 | if (val * 10 + 2 < ULONG_MAX) | ^ main.cpp:31:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long unsigned int' [-Wsign-compare] 31 | if (val * 10 + 3 < ULONG_MAX) | ^ main.cpp:36:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long unsigned int' [-Wsign-compare] 36 | if (val * 10 + 5 < ULONG_MAX) | ^ main.cpp:41:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long unsigned int' [-Wsign-compare] 41 | if (val * 10 + 7 < ULONG_MAX) | ^ main.cpp: In function 'void caut_num(int, int)': main.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 1; i < num.size(); i++) | ~~^~~~~~~~~~~~