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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. vector<int> zMatch(string s) {
  5. 	vector<int> z(s.size(), 0);
  6. 	int l = 0, r = 0;
  7. 	for (int i = 1; i < s.size(); i++) {
  8. 		if (i < r) {
  9. 			z[i] = z[i - l];
  10. 			// Handle case of z[i] reaching for characters 
  11. 			// beyond what we have seen at r
  12. 			if (i + z[i] > r) {
  13. 				z[i] = r - i;
  14. 			}
  15. 		}
  16.  
  17. 		// Look for more batch beyond the current calculation
  18. 		while(i + z[i] < s.size() && s[z[i]] == s[i + z[i]]) z[i]++;
  19.  
  20. 		// Update l, r
  21. 		if (i + z[i] > r) {
  22. 			l = i;
  23. 			r = i + z[i];
  24. 		}
  25. 	}
  26. 	return z;
  27. }
  28.  
  29.  
  30. int main() {
  31. 	vector<int> z = zMatch("aba$ababbababaaa");
  32. 	for (auto it: z) cout << it << " ";
  33. 	cout << endl;
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
0 0 1 0 3 0 2 0 0 3 0 3 0 1 1 1
https://ideone.com/98LlL7
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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