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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. long long int t,x,y,k,i,j,l;
  4. int main()
  5. {
  6. 	scanf("%lld",&t);
  7. 	while(t--)
  8. 	{
  9. 		scanf("%lld %lld",&x,&y);
  10. 		if(x==0 && y==0) printf("YES\n");
  11. 		else if((x==0 && y>0) || (x==0 && y<0))
  12. 		{
  13. 			if(y%2==0) printf("YES\n");
  14. 			else printf("NO\n");
  15. 		}
  16. 		else if(y==0 && x>0)
  17. 		{
  18. 			if(x%2!=0) printf("YES\n");
  19. 			else printf("NO\n");
  20. 		}
  21. 		else if(y==0 && x<0)
  22. 		{
  23. 			if(x%2==0) printf("YES\n");
  24. 			else printf("NO\n");
  25. 		}
  26. 		else if(x>0 && y>0)
  27. 		{
  28. 			if(y%2==0) {
  29. 				if(x<y) printf("YES\n");
  30. 				else if(x%2!=0) printf("YES\n");
  31. 				else printf("NO\n");
  32. 			}
  33. 			else if(x%2!=0) {
  34. 				if(y<=x) printf("YES\n");
  35. 				else printf("NO\n");
  36. 			}
  37. 			else printf("NO\n");
  38. 		}
  39. 		else if(x<0 && y>0)
  40. 		{
  41. 			if(y%2==0) {
  42. 				i=-1*x;
  43. 				if(i<=y) printf("YES\n");
  44. 				else if(x%2==0) printf("YES\n");
  45. 				else printf("NO\n");
  46. 			}
  47. 			else if(x%2==0) {
  48. 				i=-1*x;
  49. 				if(y<i) printf("YES\n");
  50. 				else printf("NO\n");
  51. 			}
  52. 			else printf("NO\n");
  53. 		}
  54. 		else if(x<0 && y<0)
  55. 		{
  56. 			if(y%2==0) {
  57. 				i=-1*x;
  58. 				l=-1*y;
  59. 				if(i<=l) printf("YES\n");
  60. 				else if(x%2==0) printf("YES\n");
  61. 				else printf("NO\n");
  62. 			}
  63. 			else if(x%2==0) {
  64. 				i=-1*x;
  65. 				l=-1*y;
  66. 				if(l<i) printf("YES\n");
  67. 				else printf("NO\n");
  68. 			}
  69. 			else printf("NO\n");
  70. 		}
  71. 		else if(x>0 && y<0)
  72. 		{
  73. 			l=-1*y;
  74. 			if(l<2 && x<3) printf("NO\n");
  75. 			else if(l%2==0)
  76. 			{
  77. 				if(x<=l) printf("YES\n");
  78. 				else if(x%2!=0) printf("YES\n");
  79. 				else printf("NO\n");
  80. 			}
  81. 			else if(x%2!=0)
  82. 			{
  83. 				if(l<x) printf("YES\n");
  84. 				else printf("NO\n");
  85. 			}
  86. 			else printf("NO\n");
  87. 		}
  88. 	}
  89. 	return 0;
  90. }
Success #stdin #stdout 0s 3340KB
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https://ideone.com/x8rLTV
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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