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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <string>
  4. using namespace std;
  5. string a;
  6. long long len;
  7. void makepalin()
  8. {
  9. 	for(int i = 0, j = len-1; i<len/2; ++i, --j)
  10. 	{
  11. 		a[j] = a[i];
  12. 	}
  13. }
  14. void increment(int l, int u)
  15. {
  16. 	int flag = 0;
  17. 	while(a[l]=='9'&& a[u]=='9')
  18. 	{
  19. 		a[l]='0';a[u]='0';
  20. 		if(l==0 || u==(len-1))
  21. 		{
  22. 			flag = 1;
  23. 			break;
  24. 		}
  25. 		--l;
  26. 		++u;
  27. 	}
  28. 	if(l == len/2)
  29. 		++a[l];
  30. 	else if(!flag)
  31. 	{
  32. 		++a[l]; 
  33. 		++a[u];
  34. 	}
  35. 	else if(flag)
  36. 	{
  37. 		string m(len, '0');
  38. 		if(m==a)
  39. 		{
  40. 			a = a + '1';
  41. 			++a[0]; 
  42. 		}
  43. 	}
  44. }
  45.  
  46. int main()
  47. {
  48. 	long t;
  49. 	scanf("%d", &t);
  50. 	while(t--)
  51. 	{
  52. 		cin>>a;
  53. 		string z = a;
  54. 		len = a.size();
  55. 		int i = len/2-1;
  56. 		int j = len/2;
  57. 		int k = len/2;
  58. 		makepalin();
  59. 		if(a>z)
  60. 		{
  61. 			cout<<a<<"\n";
  62. 			continue;
  63. 		}
  64. 		if(len%2)
  65. 		{
  66. 			increment(j, k);
  67. 			cout<<a<<"\n";
  68. 		}
  69. 		else
  70. 		{
  71. 			increment(i, j);
  72. 			cout<<a<<"\n";
  73. 		}
  74.  
  75. 	}
  76. 	return 0;
  77. }
Success #stdin #stdout 0s 3468KB
comments (?)
stdin
copy 
9
139999921
273
372
189992
199982
999
9999
0
120
stdout
copy 
139999931
282
373
190091
199991
1001
10001
1
121
https://ideone.com/2lg6Uy
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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