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OI-codes/UniversalOJ/35/35.cpp

74 lines
1.3 KiB
C++

#include <iostream>
#include <algorithm>
#include <array>
#include <string>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1e5 + 5;
int n, sa[N], height[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 a, int b) {
return rk[a] == rk[b] ? rk[a + w] < rk[b + w] : rk[a] < rk[b];
});
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;
}
}
}
}
void get_height() {
for (int i = 1, k = 0; i <= n; i++) {
if (!rk[i]) continue;
if (k) k--;
while (s[i + k] == s[sa[rk[i] - 1] + k]) k++;
height[rk[i]] = k;
}
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> s;
n = s.size();
s = ' ' + s;
get_sa();
get_height();
for (int i = 1; i <= n; i++) {
cout << sa[i] << ' ';
}
cout << endl;
for (int i = 2; i <= n; i++) {
cout << height[i] << ' ';
}
cout << endl;
return 0;
}