Compilare: user.cpp: In member function ‘void treap::add(int, int, treap::nod*&)’: user.cpp:61:34: warning: suggest parentheses around ‘+’ in operand of ‘&’ [-Wparentheses] crt = new nod(val, 1, (rand())&MP + 1, nil, nil); ^ user.cpp: In function ‘int main()’: user.cpp:94:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.in", "r", stdin); ^ user.cpp:95:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.out", "w", stdout); ^ user.cpp:98:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ user.cpp:101:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &pos); ^