Compilare: main.cpp: In function 'void Treap::insert(int, int)': main.cpp:64:62: warning: narrowing conversion of 'rng.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 'char' [-Wnarrowing] 64 | root = merge(temp.l, merge(new Node{nil, nil, hash(), rng(), val, 1}, temp.r)); | ~~~^~