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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. typedef long long ll;
  5.  
  6. const int M = 1e9 + 7;
  7. int n, x, F[14][6], all[280000], idx;
  8. ll res;
  9.  
  10. int Pow(int a, int b) {
  11. 	int res = 1;
  12. 	while (b != 0) {
  13. 		if (b & 1)
  14. 			res = ((ll) res * a) % M;
  15. 		a = ((ll) a * a) % M;
  16. 		b >>= 1;
  17. 	}
  18. 	return res;
  19. }
  20.  
  21. inline int calc(int cur) {
  22. 	int L = lower_bound(all, all + idx, cur) - all;
  23. 	if (L == idx)
  24. 		return 0;
  25. 	return upper_bound(all, all + idx, cur) - all - L;
  26. }
  27.  
  28. void calc(int at, int cur, int E) {
  29. 	if (at == E) {
  30. 		if (E == n)
  31. 			res += calc(((ll) x * Pow(cur, M - 2)) % M);
  32. 		else
  33. 			all[idx++] = cur;
  34. 		return;
  35. 	}
  36. 	for (int i = 0; i < 6; ++i)
  37. 		calc(at + 1, ((ll) cur * F[at][i]) % M, E);
  38. }
  39.  
  40. int main(int argc, char **argv) {
  41. 	int t;
  42. 	scanf("%d", &t);
  43. 	while (t-- != 0) {
  44. 		scanf("%d%d", &n, &x);
  45. 		for (int i = 0; i < n; ++i)
  46. 			for (int j = 0; j < 6; ++j)
  47. 				scanf("%d", &F[i][j]);
  48. 		res = idx = 0;
  49. 		calc(0, 1, n >> 1);
  50. 		sort(all, all + idx);
  51. 		calc(n >> 1, 1, n);
  52. 		printf("%lld\n", res);
  53. 	}
  54. 	return 0;
  55. }
Success #stdin #stdout 0s 16336KB
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https://ideone.com/pFtGym
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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