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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define height 4
  5. #define MAX (1<<height)
  6.  
  7. int t[MAX+1];
  8. int sz = 0;
  9.  
  10. void swap(int *x, int *y){
  11.     int tmp = *x;
  12.     *x = *y;
  13.     *y = tmp;
  14. }
  15.  
  16. void initTree(int n){
  17.     int i;
  18.     for(i=0;i<MAX;i++){
  19.         t[i] = -1;
  20.     }
  21. }
  22.  
  23. void printA(){
  24.     int i;
  25.     for(i=1;i<=sz;i++) printf("%d ",t[i]);
  26.     printf("\n");
  27. }
  28.  
  29. void printT(int i){
  30.     int x = i;
  31.     while(x/2!=0){
  32.         printf("  ");
  33.         x/=2;
  34.     }
  35.     printf("%d\n",t[i]);
  36. }
  37.  
  38. int goP(int i){
  39.     if(i/2 == 0) return 0;
  40.     else return i/2;
  41. }
  42.  
  43. int goL(int i){
  44.     if(2*i >= MAX) return 0;
  45.     else return 2*i;
  46. }
  47.  
  48. int goR(int i){
  49.     if(2*i+1 >= MAX) return 0;
  50.     else return 2*i+1;
  51. }
  52.  
  53. void preOrder(int i){
  54.     if(t[i] == -1) return;
  55.     printT(i);
  56.     preOrder(goL(i));
  57.     preOrder(goR(i));
  58. }
  59.  
  60. void inOrder(int i){
  61.     if(t[i] == -1) return;
  62.     inOrder(goL(i));
  63.     printT(i);
  64.     inOrder(goR(i));
  65. }
  66.  
  67. void postOrder(int i){
  68.     if(t[i] == -1) return;
  69.     postOrder(goL(i));
  70.     postOrder(goR(i));
  71.     printT(i);
  72. }
  73.  
  74. void insBT(int x){
  75.     int k,i = 1;
  76.     for(k=0;k<height;k++){
  77.         if(t[i]==-1){
  78.             t[i] = x;
  79.             sz++;
  80.             return;
  81.         }
  82.         if(x < t[i]) i = goL(i);
  83.         else i = goR(i);
  84.     }
  85.     printf("Error : too high -> %d\n",x);
  86. }
  87.  
  88. int popHeap(){
  89.     int i = 1;
  90.     int l,r,ma;
  91.     int ret = t[i];
  92.     t[i] = t[sz]; //t[1] = t[sz]
  93.     t[sz--] = -1; //t[sz]=-1 をしてから sz=sz-1 の意味
  94.     while(i*2 <= sz){
  95.         l = goL(i);
  96.         r = goR(i);
  97.         if(t[l]<t[r]) ma = r;
  98.         else ma = l;
  99.         if(t[i] > t[ma]) break;
  100.         swap(&t[i],&t[ma]);
  101.         i = ma;
  102.     }
  103.     return ret;
  104. }
  105.  
  106. void pushHeap(int x){
  107.     int i = ++sz;
  108.     int p;
  109.     if(i>=MAX-1) {
  110.     	printf("Error : out size < %d -> %d\n",MAX-1,i);
  111.     	t[sz] = -1;
  112.     	sz--;
  113.     	return;
  114. 	}
  115.  
  116.     t[sz] = x;
  117.     while(1<i){
  118.         p = goP(i);
  119.         if(t[i] <= t[p]) return;
  120.         else swap(&t[i],&t[p]);
  121.         i = p;
  122.     }
  123. }
  124.  
  125. int main(void){
  126.     int i,x,n;
  127.     scanf("%d",&n);
  128.     initTree(n);
  129.     for(i=0;i<n;i++){
  130.         scanf("%d",&t[i+1]);
  131.     }
  132.     sz = n;
  133. 	inOrder(1);
  134.  
  135. 	// pop
  136. 	int a=popHeap();
  137. 	printf("pop : %d\n",a);
  138. 	inOrder(1);
  139.  
  140. 	a = popHeap();
  141. 	printf("pop : %d\n",a);
  142.  
  143. 	inOrder(1);
  144.  
  145. 	printf("push : 100\n");
  146. 	pushHeap(100);
  147. 	inOrder(1);
  148.  
  149. 	printf("push : 30\n");
  150. 	pushHeap(30);
  151. 	inOrder(1);
  152.     return 0;
  153. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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12
89 34 55 13 16 21 32 2 3 4  5 8
stdout
copy 
      2
    13
      3
  34
      4
    16
      5
89
      8
    21
  55
    32
pop : 89
      2
    13
      3
  34
      4
    16
      5
55
    21
  32
    8
pop : 55
      2
    13
      3
  16
      4
    5
34
    21
  32
    8
push : 100
      2
    13
      3
  34
      4
    16
      5
100
    21
  32
    8
push : 30
      2
    13
      3
  34
      4
    16
      5
100
      21
    30
  32
    8
https://ideone.com/jSXVVG
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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