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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define MOD                     1000000007
  6. #define fill(a,v)               memset(a,v,sizeof a)
  7.  
  8. typedef long long int LL;
  9.  
  10. int n;
  11. LL dp[1 << 10][101],temp,one;
  12. bool tshirt[10][101];
  13.  
  14. void init() {
  15. 	fill(tshirt,false);
  16. 	fill(dp,-1);
  17. 	fill(dp[temp-1],1);
  18. 	return;
  19. }
  20.  
  21. void readinput() {
  22. 	getchar();
  23. 	stringstream ss;
  24. 	int foo,k;
  25. 	string inp;
  26. 	k = 1;
  27. 	while (k <= n) {
  28. 		getline (cin, inp);
  29. 		ss.clear ();
  30. 		ss.str ("");
  31. 		ss << inp;
  32. 		while (ss >> foo) {
  33. 			tshirt[k][foo] = true;
  34. 		}
  35. 		k++;
  36. 	}
  37. 	return;
  38. }
  39.  
  40. LL instance(int mask,int id) {
  41. 	if(mask == temp - 1) return 1;
  42. 	if(id == 101) return 0;
  43. 	if(dp[mask][id] != -1) return dp[mask][id];
  44. 	dp[mask][id] = 0;
  45. 	dp[mask][id] += instance(mask,id+1);
  46. 	for (int i = 0; i < n; ++i) {
  47. 		if( (!(mask & (1 << i))) && tshirt[i+1][id]) {
  48. 			dp[mask][id] += instance(mask|(1 << i),id+1);
  49. 			dp[mask][id] %= MOD;
  50. 		}
  51. 	}
  52. 	return dp[mask][id];
  53. }
  54.  
  55. int main()
  56. {
  57.     int t;
  58.     cin >> t ;
  59.     while(t--) {
  60.     	cin >> n;
  61.     	temp = 1 << n;
  62.     	init();
  63.     	readinput();
  64. 		printf("%lld\n",instance(0,1));
  65.     }
  66.     return 0;
  67. }
Runtime error #stdin #stdout 3.91s 3544KB
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https://ideone.com/dTD9nL
language:
C++ 4.3.2 (gcc-4.3.2)
created:
8 years ago
visibility:
public

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