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  1. #include<iostream>
  2. using namespace std;
  3.  
  4. int  recur(string str,int i,int l){
  5. 	int a,b,count;
  6.  
  7. 	if((i+1>l)&&(i+2>l))
  8. 	{
  9. 		count=count+1;
  10. 		return count;
  11. 	}
  12. 	else{
  13.  
  14. 	if(i+1<=l)
  15. 	count=count+recur(str,i+1,l);
  16. 	if(i+2<=l){
  17. 		a=str[i+1]-'0';
  18. 		a=a*10;
  19. 		b=str[i+2]-'0';
  20. 		b=a+b;
  21. 		if((b>=1)&&(b<=26))
  22. 		count=count+recur(str,i+2,l);
  23.  
  24. 	}
  25. }
  26. return count;
  27.  
  28. }
  29. int main(){
  30. 	int i;
  31. 	 string str1,str2;
  32. 	 cin>>str1;
  33. 	// cout<<str1.length();
  34. 	for(i=0;i<str1.length();i++)
  35. 	str2[i+1]=str1[i];
  36. 	int l=str1.length();
  37. 		if(str1=="0")
  38. 		return 0;
  39. 		else
  40. 		{	
  41. 			i=0;
  42. 			int count =0;
  43. 			count=recur(str2,i,l);
  44. 			cout<<count<<"\n";
  45. 		}
  46.  
  47.  
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 3300KB
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https://ideone.com/3VpKnO
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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