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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	int t,flag=1;
  6. 	unsigned long long x,y;
  7. 	scanf("%d",&t);
  8. 	while(t--){
  9. 		scanf("%llu %llu",&x,&y);
  10. 		flag=1;
  11. 		if(x==0 && y==0){flag=1;}
  12. 		else if(x==0){
  13. 			if(y%2!=0){flag=0;}
  14. 			    }
  15. 		else if(y==0){
  16. 			if(x<0 && x%2!=0){flag=0;}
  17. 			else if(x>0 && x%2==0){flag=0;}
  18. 		}	    
  19.  
  20. 		else if(x>0){
  21. 			if(x%2==0){
  22. 				if(y%2!=0){flag=0;}
  23. 			}
  24. 			else if(x%2!=0){
  25. 				if(y%2!=0){
  26. 					if(y>0 && y>x){
  27. 						flag=0;
  28. 					}
  29. 					else if(y<0){
  30. 						y=y*(-1);
  31. 						if(x<=y){flag=0;}
  32. 					}
  33. 				}
  34. 			}
  35. 		}
  36. 		else if(x<0){
  37. 			x=x*(-1);
  38. 			if(x%2==0){
  39. 				if(y<0 && y%2!=0){
  40. 					y=y*(-1);
  41. 					if(y>x)flag=0;}
  42. 			}
  43. 			else if(x%2!=0){
  44. 				if(y%2!=0){flag=0;}
  45. 				else if(y%2==0 && y>0 && y<x){flag=0;}
  46. 				else if(y%2==0 && y<0){
  47. 					y=y*(-1);
  48. 					if(y<x){flag=0;}
  49. 				}
  50. 			}
  51. 		}
  52. 		if(flag==1){printf("YES\n");}
  53. 		else if(flag==0){printf("NO\n");}
  54.  
  55.  
  56. 	}//wh
  57.  
  58.  
  59. 	return 0;
  60. }
Success #stdin #stdout 0s 2296KB
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5
3 0
-2 0
-2 2
-1 0
-3 5
stdout
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YES
NO
YES
YES
YES
https://ideone.com/G7WtLE
language:
C (gcc 8.3)
created:
9 years ago
visibility:
secret

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