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  1. //Xay dung chuong trinh theo pp POP
  2. #include<iostream>
  3. #include <bits/stdc++.h>
  4. using namespace std;
  5. bool checkNChuSo(int k, int n){
  6. 	string s = to_string(k);
  7. 	if(s.length() == n){
  8. 		return true;
  9. 	}
  10. 	return false;
  11. }
  12.  
  13. bool checkNT(int k){
  14. 	if(k < 2){
  15. 		return false;
  16. 	}
  17. 	for(int i = 2;i <= sqrt(k);i++){
  18. 		if(k % i == 0){
  19. 			return false;
  20. 		}
  21. 	}
  22. 	return true;
  23. }
  24.  
  25. bool checkSumNT(int k){
  26. 	string s = to_string(k);
  27. 	int sum = 0;
  28. 	for(int i = 0;i < s.length();i++){
  29. 		sum += s[i] - '0';
  30. 	}
  31. 	if(checkNT(sum)){
  32. 		return true;
  33. 	}
  34. 	return false;
  35. }
  36.  
  37.  
  38. bool checkEachNT(int k){
  39. 	while(k > 0){
  40. 		int so = k%10;
  41. 		if(so != 2 && so != 3 && so != 5 && so!= 7){
  42. 			return false;
  43. 		}
  44. 		k /= 10;
  45. 	}
  46. 	return true;
  47. }
  48.  
  49. int main(){
  50. 	//1.Input
  51. 	int k,n;
  52. 	cin>>k>>n;
  53. 	//2.Process
  54. 	bool exist=false;
  55. 	if(checkNChuSo(k,n) && checkNT(k) && checkSumNT(k) && checkEachNT(k)){
  56. 		exist=true;
  57. 	}
  58. 	//3.Output
  59. 	if(exist){
  60. 		cout<<"Dap ung";
  61. 	}else{
  62. 		cout<<"Ko dap ung";
  63. 	}
  64. 	return 0;
  65. }
Success #stdin #stdout 0.01s 5320KB
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Ko dap ung
https://ideone.com/abnuMJ
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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