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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. bool is_prime(int k) {
  4. 	if(k < 2) return 0;
  5. 	for(int i = 2; i <= sqrt(k); i++)
  6. 		if(k % i == 0) return 0;
  7. 	return 1;
  8. }
  9. bool check_prime(int k) {
  10. 	if(is_prime(k)) return 1;
  11. 	return 0;
  12. }
  13. bool check_sum_prime(int k) {
  14. 	int  s = 0;
  15. 	while(k != 0){ 
  16. 		s += k % 10; 
  17. 		k /= 10;
  18. 	}
  19. 	if(is_prime(s)) return 1;
  20. 	return 0;
  21. }
  22. bool check_element(int k) {
  23. 	while(k != 0) {
  24. 		if(!is_prime(k % 10)) return 0;
  25. 		k /= 10;
  26. 	}
  27. 	return 1;
  28. }
  29. bool check_n(int k, int n) {
  30. 	int d = 0;
  31. 	while(k != 0) {
  32. 		k /= 10;
  33. 		d++;
  34. 	}
  35. 	if(d == n) return 1;
  36. 	return 0;
  37. }
  38. int main() {
  39. 	int k, n;
  40. 	cin >> k >> n;
  41. 	if(check_n(k, n)) cout << k << " co " << n << " chu so" << endl;
  42. 	if(check_sum_prime(k)) cout << k << " co tong cac chu so la so nguyen to" << endl;
  43. 	if(check_prime(k)) cout << k << " la so nguyen to" << endl;
  44. 	if(check_element(k)) cout << k << " co cac chu so la so nguyen to" << endl;
  45. }
Success #stdin #stdout 0s 5280KB
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https://ideone.com/TZ6VFt
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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