#include<stdio.h>
#include<string.h>
struct RBtree {
struct Node {
int val,color;
Node *lch,*rch;
Node():val(0),color(0),lch(NULL),rch(NULL) {}
};
Node *root;
void insert(int x)
};
#include<stdio.h>
#include<string.h>
struct RBtree {
struct Node {
int val,color;
Node *lch,*rch;
Node():val(0),color(0),lch(NULL),rch(NULL) {}
};
Node *root;
void insert(int x)
};