Compilare: user.cpp: In function ‘int main()’: user.cpp:45:19: warning: narrowing conversion of ‘time(0u)’ from ‘time_t {aka long int}’ to ‘std::mersenne_twister_engine<unsigned int, 32u, 624u, 397u, 31u, 2567483615u, 11u, 4294967295u, 7u, 2636928640u, 15u, 4022730752u, 18u, 1812433253u>::result_type {aka unsigned int}’ inside { } [-Wnarrowing] mt19937 m{time(nullptr)}; ~~~~^~~~~~~~~