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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4. long long int len;
  5. long long int memo[5001];
  6. char str[5001];
  7.  
  8. long long int solve(int i)
  9. {  if(str[i]=='0')
  10. 	  return 0;
  11. 	 if(i>=len)
  12. 	  return 1;
  13. if(i==len-1) return 1;
  14.  
  15. if(memo[i]!=-1) return memo[i];
  16. long long int ans = solve(i+1);
  17.  
  18. if(i+1<len&&10*(str[i]-'0')+(str[i+1]-'0')<=26)
  19. 	ans = ans +solve(i+2);
  20.  return memo[i] = ans;
  21. }
  22. int main()
  23. {
  24. 	while(1)
  25. 	{
  26. 		scanf("%s",str);
  27. 		if(str[0]=='0')
  28. 			break;
  29. 		memset(memo,-1,5001);
  30. 		len=strlen(str);
  31. 		printf("%lld\n",solve(0));
  32. 	}
  33. 	return 0;
  34. }
  35.  
Runtime error #stdin #stdout 0.03s 3144KB
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https://ideone.com/KxpmuI
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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