Compilare: main.cpp: In function 'void Add(long long int)': main.cpp:92:57: warning: narrowing conversion of 'my_rand.std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>::operator()()' from 'std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>::result_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing] 92 | T = join(t.first,join(new Node{&nil,&nil,val,my_rand(),1,val},t.second)); | ~~~~~~~^~