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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <stdlib.h>
  4. #define ll long long
  5.  
  6. int cmp(const void *a, const void * b){
  7.     int *p1 = (int*)a;
  8.     int *p2 = (int*)b;
  9.     return *p1  - *p2;
  10. }
  11.  
  12. //D,L,F,G,Q,J
  13. int gcd(int a, int b){
  14.     while(b  != 0){
  15.         int temp = a % b;
  16.         a = b; b = temp;
  17.     }
  18.     return a;
  19. }
  20.  
  21. void solve(){
  22.     int n; scanf("%d", &n);
  23.     int a[n];
  24.     for(int i=0; i<n; i++){
  25.         scanf("%d", a+i);
  26.     }
  27.     qsort(a, n, sizeof(int), cmp);
  28.     int g = a[1] - a[0];
  29.     for(int i=2 ; i < n; i++){
  30.         g = gcd(a[i] - a[i-1], g);
  31.     }
  32.     int res = 0;
  33.     for(int i = 1; i *i <=g ;i++){
  34.         if(g %  i == 0 ){
  35.             res++;
  36.             if(i != g/i) res++;
  37.         }
  38.     }
  39.     printf("%d\n",res);
  40. }
  41.  
  42. int main(){
  43.     int typetest = 1;
  44.     if(typetest){
  45.         int t; scanf("%d", &t);
  46.         while(t--){
  47.             solve();
  48.         }
  49.     }else solve();
  50. }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/CKHcV4
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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