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#305. 【模板】后缀排序

https://sjzezoj.com/submission/53220
This commit is contained in:
Baoshuo Ren 2022-06-05 11:42:24 +08:00
parent 08dbbe056d
commit ed2f6d2437
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
24 changed files with 122 additions and 0 deletions

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#include <iostream>
#include <algorithm>
#include <array>
#include <string>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1e6 + 5;
int n, sa[N];
std::string s;
std::array<int, N> rk, rk1;
void get_sa() {
for (int i = 1; i <= n; i++) {
sa[i] = i;
rk[i] = s[i];
}
for (int w = 1; w < n; w <<= 1) {
std::sort(sa + 1, sa + 1 + n, [&](int x, int y) {
return rk[x] == rk[y] ? rk[x + w] < rk[y + w] : rk[x] < rk[y];
});
rk1 = rk;
for (int i = 1, p = 0; i <= n; i++) {
if (rk1[sa[i]] == rk1[sa[i - 1]] && rk1[sa[i] + w] == rk1[sa[i - 1] + w]) {
rk[sa[i]] = p;
} else {
rk[sa[i]] = ++p;
}
}
}
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> s;
n = s.size();
s = ' ' + s;
get_sa();
for (int i = 1; i <= n; i++) cout << sa[i] << ' ';
cout << endl;
return 0;
}

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