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  1.     #include <bits/stdc++.h>
  2.     using namespace std;
  3.     inline int32_t max(int32_t a, int32_t b)
  4. 	{ 
  5. 	    return a - ((a-b) & (a-b)>>31);
  6. 	}
  7.     string s1;
  8.     int z[16005], mn[8005], mx, cnt[8005], n2, m, ret, k1;
  9.     void getZ(int k) {
  10. 	    mx = 0;	
  11. 	 	int n = n2 + m + 1;
  12.  
  13. 	    for (int i = k+1, l = 0, r = 0; i < n; ++i) {
  14. 	        if (i <= r)
  15. 	            z[i] = min (r - i + 1, z[i - l + k]);
  16. 	        while (i + z[i] < n && s1[z[i]+k] == s1[i + z[i]])
  17. 	            ++z[i];
  18. 	        if (i + z[i] - 1 > r)
  19. 	            l = i, r = i + z[i] - 1;
  20. 	        if(i > n2) {
  21. 		    	mx = max(z[i], mx);
  22. 	    		cnt[z[i]]++;
  23. 		    }
  24. 		    if(i<n2) 	mn[i] = max(mn[i], z[i]);
  25.  
  26. 	    }
  27.  
  28. 	    for (int j = mx ; j > 1 ; j--)
  29. 	    	cnt[j - 1] += cnt[j];
  30.  
  31. 	    //calculating number of k occurrences
  32. 	    for (int j = mn[k] + 1; j <= mx; j++)
  33. 		    if (cnt[j] == k1) ret++;
  34.  
  35.     	/*cout<<s1.substr(k,n)<<" "<<k<<endl;
  36.     	for(int p = k; p < n; ++p)
  37. 			cout<<z[p]<<" ";
  38. 		cout<<endl;*/
  39.     }
  40.  
  41.     int main()
  42.     {
  43.  
  44.     ios_base::sync_with_stdio(false);
  45.     cin.tie(NULL);
  46.     int t , c=1 , k;
  47.     cin >> t;
  48.     for (; t; t--)
  49.     {
  50. 	    cout <<"Case #" << c++ << ":" << "\n";
  51. 	    string s12, s2;
  52. 	    cin >> s12;
  53. 	    cin >> s2;
  54. 	    cin >> k1;
  55. 	    n2 = s12.length(); 
  56. 	    m = s2.length();
  57. 	    s1 = "";
  58. 	    s1 += s12;
  59. 	    s1 += "$";
  60. 	    s1 += s2;
  61. 	  	ret = 0;
  62. 	    memset (mn , 0 , sizeof mn);
  63.  
  64. 	    for (int i = 0 ; i < n2; i++)
  65. 	    {
  66. 		    memset (z , 0 , sizeof z);
  67. 		    memset (cnt , 0 , sizeof cnt);
  68. 		    getZ(i);
  69. 	    }
  70.  
  71. 		cout<<ret<<"\n";
  72. 	 }
  73.     return 0;
  74.     }
Success #stdin #stdout 1.51s 3672KB
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https://ideone.com/9OzGGX
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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