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  1. #include<iostream>
  2. #include<cmath>
  3. #include<cstdio>
  4.  
  5. using namespace std;
  6.  
  7. struct pt {
  8.     double x, y;
  9. 	pt(double x, double y) : x(x), y(y) {}
  10. };
  11.  
  12. void rotate(pt &p, double angle) {
  13. 	double cosA = cos(angle), sinA = sin(angle);
  14. 	p = pt(p.x*cosA-p.y*sinA , p.x*sinA+p.y*cosA);
  15. }
  16.  
  17. bool eq(double a, double b) {
  18. 	return fabs(a-b) < 1e-9; 
  19. }
  20.  
  21. int main() {	
  22. 	int t; cin >> t;
  23. 	for(int i = 0; i < t; i++) {
  24. 		int a; cin >> a;
  25. 		double angle = (180-a)/180.*acos(-1);
  26. 		pt v(1,0);
  27. 		bool ok = false, r = false;
  28. 		for(int j = 0; j < 360; j++) {
  29. 			rotate(v, angle);
  30. 			if(eq(v.x,1) && eq(v.y,0)) {
  31. 				ok = true;
  32. 				break;
  33. 			}
  34. 			if(v.y < 0) {
  35. 				r = true;
  36. 			}
  37. 			if(r && v.y > 0) {
  38. 				break;
  39. 			}
  40. 		}
  41. 		cout << (ok?"YES":"NO") << endl;
  42. 	}
  43. }
  44.  
Success #stdin #stdout 0s 2896KB
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https://ideone.com/e3kIXZ
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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