cpp_src/string/Zalgo.hpp

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• Last update: 2020-07-17 17:57:06+09:00
• Include: #include "cpp_src/string/Zalgo.hpp"

Verified with

• test/yosupo/Z.test.cpp

Code

vector<int> Z_algo(const string &S) {
	vector<int> A(S.size());
	A[0] = S.size();
	int i = 1, j = 0;
	while (i < S.size()) {
		while (i+j < S.size() && S[j] == S[i+j]) ++j;
		A[i] = j;
		if (j == 0) { ++i; continue; }
		int k = 1;
		while (i+k < S.size() && k+A[k] < j) A[i+k] = A[k], ++k;
		i += k; j -= k;
	}
	return A;
}

#line 1 "cpp_src/string/Zalgo.hpp"
vector<int> Z_algo(const string &S) {
	vector<int> A(S.size());
	A[0] = S.size();
	int i = 1, j = 0;
	while (i < S.size()) {
		while (i+j < S.size() && S[j] == S[i+j]) ++j;
		A[i] = j;
		if (j == 0) { ++i; continue; }
		int k = 1;
		while (i+k < S.size() && k+A[k] < j) A[i+k] = A[k], ++k;
		i += k; j -= k;
	}
	return A;
}

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