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  1. #include <iostream>
  2. #include<string.h>
  3. #include<math.h>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	char s[100000];
  9. 	cin>>s;
  10. 	int l=0,r=0,u=0,d=0;
  11. 	int i,cnt1=0,cnt2=0;
  12. 	for(i=0;i<strlen(s);i++)
  13. 	{
  14. 		if(s[i]=='L')
  15. 		l++;
  16. 		if(s[i]=='R')
  17. 		r++;
  18. 		if(s[i]=='D')
  19. 		d++;
  20. 		if(s[i]=='U')
  21. 		u++;
  22. 	}
  23. 	if(l==r&&u==d)
  24. 	cout<<0;
  25. 	else 
  26. 	{
  27. 	if((l+r+u+d)%2!=0)
  28. 	cout<<-1;
  29. 	else
  30. 	{
  31. 	if(u!=d)
  32. 	{
  33. 		if(abs(u-d)%2==0)
  34. 		cnt1=abs(u-d)/2;
  35. 		else
  36. 		{cnt1=abs(u-d);
  37. 		if(l>r)
  38. 		l=l-abs(u-d);
  39. 		else
  40. 		r=r-abs(u-d);
  41. 		}
  42. 	}
  43. 	if(l!=r)
  44. 	{
  45. 	cnt1+=abs(l-r)/2;	
  46. 	}
  47. 	cout<<cnt1;
  48. 	}
  49. 	}
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 16064KB
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DUDUDRRRRRRRLL
stdout
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3
https://ideone.com/j10ZjO
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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