src/str/z_func/lib.hpp
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|---|---|---|---|
| 1 | #pragma once | ||
| 2 | |||
| 3 | #include "../../util/alias/others/lib.hpp" | ||
| 4 | |||
| 5 | namespace tifa_libs { | ||
| 6 | |||
| 7 | 29 | CEXP vecu z_func(strnv s) NE { | |
| 8 | 29 | cu32 n = (u32)s.size(); | |
| 9 | 29 | vecu z(n); | |
| 10 |
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9311639 | for (u32 i = 1, l = 0, r = 0; i < n; ++i) { |
| 11 |
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9311610 | if (i <= r && z[i - l] < r - i + 1) z[i] = z[i - l]; |
| 12 | else { | ||
| 13 |
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6322728 | if (i <= r) z[i] = r - i + 1; |
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11932138 | while (i + z[i] < n && s[z[i]] == s[i + z[i]]) ++z[i]; |
| 15 | } | ||
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9311610 | if (i + z[i] - 1 > r) r = i + z[l = i] - 1; |
| 17 | } | ||
| 18 | 29 | z[0] = n; | |
| 19 | 29 | return z; | |
| 20 | } | ||
| 21 | |||
| 22 | } // namespace tifa_libs | ||
| 23 |