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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define sz(x) static_cast<int>((x).size())
  5. #define pb push_back
  6.  
  7. namespace BST {
  8.  
  9.   struct Node {
  10.     int value;
  11.     int left, right;
  12.     Node() : left(-1), right(-1) { }
  13.     Node(int value) : value(value), left(-1), right(-1) { }
  14.   };
  15.  
  16.   vector<Node> m;
  17.  
  18.   void init() {
  19.     m.clear();
  20.   }
  21.  
  22.   int rec(int ind, int value) {
  23.     if( ind == -1 ) {
  24.       m.pb(Node(value));
  25.       return sz(m)-1;
  26.     }
  27.     if( value < m[ind].value )
  28.       m[ind].left = rec(m[ind].left, value);
  29.     else
  30.       m[ind].right = rec(m[ind].right, value);
  31.     return ind;
  32.   }
  33.  
  34.   void push(int value) {
  35.     if( m.empty() ) {
  36.       m.pb(Node(value));
  37.     } else {
  38.       rec(0,value);
  39.     }
  40.   }
  41.  
  42.   void print(int ind) {
  43.     if( ind != -1 ) {
  44.       print(m[ind].left);
  45.       cout << m[ind].value << " ";
  46.       print(m[ind].right);         
  47.     }
  48.   }
  49.  
  50.   void print() {
  51.     print(0); cout << "\n";
  52.   }
  53.  
  54. }
  55.  
  56. int main() {
  57.  
  58.   int n;
  59.   while( cin >> n ) {
  60.     BST::init();
  61.     while( n-- ) {
  62.       int t; cin >> t; BST::push(t);
  63.     }
  64.     BST::print();
  65.   }    
  66.  
  67.   return 0;
  68. }
Success #stdin #stdout 0s 3432KB
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stdin
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10
3 1 5 3 2 4 6 2 3 0
stdout
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0 2 3 3 4 6
https://ideone.com/ExjUGD
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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