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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. typedef long long ll;
  5.  
  6. const int N = 1e4;
  7. int n, q, a[N], dp[N][14], Pow[15];
  8. char z[31];
  9. unordered_map<ll, int> idx;
  10.  
  11. int calc(char *s) {
  12. 	int n = strlen(s), res = 0;
  13. 	bool ok1, ok2;
  14. 	for (int i = 0; i < n; ++i) {
  15. 		ok1 = ok2 = true;
  16. 		for (int j = 0;; ++j) {
  17. 			if (i + j < n && i - j >= 0 && s[i + j] == s[i - j] && ok1)
  18. 				++res;
  19. 			else
  20. 				ok1 = false;
  21. 			if (i + j + 1 < n && i - j >= 0 && s[i + j + 1] == s[i - j] && ok2)
  22. 				++res;
  23. 			else
  24. 				ok2 = false;
  25. 			if (!ok1 && !ok2)
  26. 				break;
  27. 		}
  28. 	}
  29. 	return res;
  30. }
  31.  
  32. inline ll getHash(char *s) {
  33. 	ll res = 0;
  34. 	for (int i = 0; s[i]; ++i)
  35. 		res = res * 4 + (s[i] - 'a' + 1);
  36. 	return res;
  37. }
  38.  
  39. inline int calc(int l, int r) {
  40. 	int log = 0;
  41. 	while (Pow[log] <= r - l + 1)
  42. 		++log;
  43. 	--log;
  44. 	if (a[dp[l][log]] < a[dp[r - Pow[log] + 1][log]])
  45. 		return dp[r - Pow[log] + 1][log];
  46. 	return dp[l][log];
  47. }
  48.  
  49. int main(int argc, char **argv) {
  50. 	Pow[0] = 1;
  51. 	for (int i = 1; i < 15; ++i)
  52. 		Pow[i] = Pow[i - 1] << 1;
  53. 	int t;
  54. 	scanf("%d", &t);
  55. 	while (t-- != 0) {
  56. 		idx.clear();
  57. 		scanf("%d%d", &n, &q);
  58. 		for (int i = 0; i < n; ++i) {
  59. 			scanf("%s", z);
  60. 			a[i] = calc(z);
  61. 			idx[getHash(z)] = i;
  62. 		}
  63. 		for (int i = 0; i < n; ++i)
  64. 			dp[i][0] = i;
  65. 		for (int j = 1; Pow[j] <= n; ++j)
  66. 			for (int i = 0; i + Pow[j] <= n; ++i)
  67. 				if (a[dp[i][j - 1]] < a[dp[i + Pow[j - 1]][j - 1]])
  68. 					dp[i][j] = dp[i + Pow[j - 1]][j - 1];
  69. 				else
  70. 					dp[i][j] = dp[i][j - 1];
  71. 		while (q-- != 0) {
  72. 			scanf("%s", z);
  73. 			int l = idx[getHash(z)];
  74. 			scanf("%s", z);
  75. 			int r = idx[getHash(z)];
  76. 			if (r < l)
  77. 				swap(l, r);
  78. 			printf("%d\n", calc(l, r) + 1);
  79. 		}
  80. 	}
  81. 	return 0;
  82. }
Runtime error #stdin #stdout 0.01s 15824KB
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https://ideone.com/iVZNHd
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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