Compilare: main.cpp: In function 'treap* build(int, int)': main.cpp:42:59: warning: narrowing conversion of '(rng.std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::operator()<long unsigned int, 32ul, 624ul, 397ul, 31ul, 2567483615ul, 11ul, 4294967295ul, 7ul, 2636928640ul, 15ul, 4022730752ul, 18ul, 1812433253ul>() % 1000000007ul)' from 'std::mersenne_twister_engine<long unsigned int, 32ul, 624ul, 397ul, 31ul, 2567483615ul, 11ul, 4294967295ul, 7ul, 2636928640ul, 15ul, 4022730752ul, 18ul, 1812433253ul>::result_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] treap* nod = new treap{emptyNode, emptyNode, mid, rng() % mod, 1, false}; ~~~~~~^~~~~