Compilare: user.cpp: In function ‘void prime()’: user.cpp:16:25: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess] memset(mark,0,sizeof(mark)); ^ user.cpp: In function ‘treap* find(treap*, int)’: user.cpp:110:9: warning: unused variable ‘dr’ [-Wunused-variable] int dr=(p->right ? p->right->many : 0); ^ user.cpp: In function ‘int main()’: user.cpp:173:21: warning: unused variable ‘mvstar’ [-Wunused-variable] int Start=1,mvstar,mv; ^ user.cpp:196:26: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] else out<<ans[pos-1]<<'\n'; ^