Compilare: main.cpp: In function 'treap_node* rotate_left(treap_node*)': main.cpp:42:17: warning: unused variable 'T3' [-Wunused-variable] treap_node *T3=y->right; ^~ main.cpp:43:17: warning: unused variable 'T1' [-Wunused-variable] treap_node *T1=x->left; ^~ main.cpp: In function 'int succesor(treap_node*, int, int&)': main.cpp:180:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int predecesor(treap_node*, int, int&)': main.cpp:202:1: warning: control reaches end of non-void function [-Wreturn-type] } ^