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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct point{
  6. 	int x, y;
  7. 	point(){
  8. 		x = 0;
  9. 		y = 0;
  10. 	}
  11. 	point(int x1,int y1){
  12. 		x=x1;
  13. 		y=y1;
  14. 	}
  15. 	bool isequal(point&a, point&b);
  16. }my_point;
  17.  
  18. bool point::isequal(point&a, point&b){
  19. 	return a.x == b.x and a.y == b.y;
  20. } 
  21.  
  22. int main() {
  23. 	int counter = 0, x = 0, y = 0, res = 0;
  24. 	char c;
  25. 	bool stop = false;
  26. 	vector<point> coor(1);
  27. 	while(cin >> c and stop == false){
  28. 		if(c == 'L'){
  29. 			counter = (counter + 1)%4;
  30. 		}
  31. 		else if(c == 'R'){
  32. 			counter = ((counter - 1) + 4)%4;
  33. 		}
  34. 		else{
  35. 			if(counter == 0){
  36. 				y++;
  37. 			}
  38. 			else if(counter == 1){
  39. 				x--;
  40. 			}
  41. 			else if(counter == 2){
  42. 				y--;
  43. 			}
  44. 			else{
  45. 				x++;
  46. 			}
  47. 			res++;
  48. 			point a(x,y);
  49. 			for(int j = 1; j < coor.size();j++){
  50. 				if(my_point.isequal(coor[j],a)){
  51. 					stop = true;
  52. 				}
  53. 			}
  54. 			coor.push_back(a);
  55. 		}
  56. 	}
  57. 	cout << ((stop == true) ? res : -1);
  58. 	return 0;
  59. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
SRLSRLSLRSLRLSLSLSLSSSLRLSSLRSLRSRSRSRSLRLSRLLLLLSRLSRL
stdout 
7
https://ideone.com/WNDln9
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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