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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <string.h>
  4.  
  5. int solve(char c[]){
  6. 	int d = c[0] - '0', cuoi = c[strlen(c) - 1] - '0';
  7. 	if(!(d == 2 * cuoi || cuoi == 2 * d)) return 0;
  8. 	int l = 1, r = strlen(c) - 2;
  9. 	while(l < r){
  10. 		if(c[l] != c[r])
  11. 			return 0;
  12. 		++l; --r;
  13. 	}	
  14. 	return 1;
  15. } 
  16.  
  17. int main(){
  18. 	int t; scanf("%d", &t);
  19. 	while(t--){
  20. 		char c[20];
  21. 		scanf("%s",c);
  22. 		if(solve(c))
  23. 			printf("YES\n");
  24. 		else printf("NO\n");
  25. 	}
  26. }
Success #stdin #stdout 0s 5400KB
comments (?)
stdin
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3
45677658
123322
4888888
stdout
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YES
YES
YES
https://ideone.com/88ufa1
Minh - Kiểm tra số gần thuận nghịch
language:
C++ (gcc 8.3)
created:
318 days ago
visibility:
public

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