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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4.  
  5. int gcd(int a,int b) {
  6.  
  7.  
  8. 	if (b==0) return a;
  9.  
  10.  
  11. 	return gcd(b,a%b);
  12. }
  13.  
  14. void solve() {
  15.  
  16.  
  17. 	int n; cin >> n;
  18.  
  19. 	int a[n];
  20. 	for (int i=0; i<n; i++) cin >> a[i];
  21.  
  22. 	int g=gcd(a[0],a[1]);
  23.  
  24. 	for (int i=2; i<n; i++) {
  25.  
  26. 		g=gcd(g,a[i]);
  27.  
  28. 	}
  29.  
  30. 	int count=0;
  31. 	for (int i=1; i*i<=g; i++) {
  32.  
  33. 		if (g%i==0) {
  34.  
  35. 			count++;
  36.  
  37. 		}
  38.  
  39. 		if (g%i!=i) count++;
  40.  
  41. 	}
  42.  
  43.  
  44.  
  45. 	cout << count << endl; 
  46.  
  47.  
  48.  
  49.  
  50.  
  51. }
  52.  
  53. int main() {
  54.  
  55.     // ios_base::sync_with_stdio(false);
  56.     // cin.tie(NULL);
  57.  
  58.     int t = 1;
  59.     // cin >> t;
  60.  
  61.  
  62.     while(t--) {
  63.  
  64.         solve();
  65.     }
  66.  
  67.  
  68. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
5
3 9 12 15 18
stdout 
2
https://ideone.com/2zZuG7
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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