提交记录 4507


用户 题目 状态 得分 用时 内存 语言 代码长度
GuGuDove 1006. 【模板题】后缀排序 Wrong Answer 0 47.444 ms 3572 KB C++11 1.61 KB
提交时间 评测时间
2018-07-24 10:16:34 2020-07-31 23:03:51
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
const int maxn = 200005;
char r,s[maxn];
int sa[maxn], t[maxn], t2[maxn], c[maxn], n, rk[maxn], h[maxn];  //x一直是rank数组
void getSA(int m) {  //0到m-1
	int i, *x = t, *y = t2;
	for (i = 0; i < m; ++i)c[i] = 0;
	for (i = 0; i < n; ++i)x[i] = s[i];
	for (i = 0; i < n; ++i)c[x[i]]++; 
	for (i = 1; i < m; ++i)c[i] += c[i - 1];
	for (i = n - 1; i >= 0; --i)sa[--c[x[i]]] = i;   //这是蓝书做法
	for (int k = 1; k <= n; k <<= 1) {
		int p = 0;
		for (i = n - 1; i >= n - k; --i)y[p++] = i; //直接利用sa数组,第二关键字单个排序,y是由排名到下标的数组。
		                                            //这里要反排这样可以不用做最后一次排序,否则要再做一次
		/*for (i = n - k; i < n; ++i)y[p++] = i;*/
		for (i = 0; i < n; ++i)if (sa[i] >= k)y[p++] = sa[i] - k;
		//基数排序求sa
		for (i = 0; i < m; ++i)c[i] = 0;
		for (i = 0; i < n; ++i)c[x[y[i]]]++;
		for (i = 0; i < m; ++i)c[i] += c[i - 1];
		for (i = n - 1; i >= 0; --i)sa[--c[x[y[i]]]] = y[i]; //第一次利用后缀位置优先序,这里利用第二关键字优先序
		swap(x, y);
		p = 1;
		x[sa[0]] = 0;
		for (i = 1; i < n; ++i)
			x[sa[i]] = y[sa[i]] == y[sa[i - 1]] && y[sa[i] + k] == y[sa[i - 1] + k] ? p - 1 : p++;
		if (p >= n)break;
		m = p;
	}
}
void getH() {
	int i, j, k = 0;
	for (i = 0; i < n; ++i)rk[sa[i]] = i;
	for (i = 0; i < n; ++i) {
		if (k)k--;
		if (rk[i]) {
			j = sa[rk[i] - 1];
			while (s[i + k] == s[j + k])k++;
		}	
		h[rk[i]] = k;
	}
}
int main() {
	scanf("%s", s);
	n = strlen(s);
	for (int i = 0; i < n; ++i)s[i] = s[i] - 'a' + 1;
	getSA(27);
	getH();
	if (n) {
		for (int i = 0; i < n; ++i)printf("%d ", sa[i]+1); //默认序从0开始
		printf("\n");
		for (int i = 1; i < n; ++i)printf("%d ", h[i]);
	}
	return 0;
}

CompilationN/AN/ACompile OKScore: N/A

Subtask #1 Testcase #110.1 us44 KBWrong AnswerScore: -100

Subtask #1 Testcase #214.41 us44 KBAcceptedScore: 0

Subtask #1 Testcase #314.86 us44 KBAcceptedScore: 100

Subtask #1 Testcase #416 us44 KBAcceptedScore: 0

Subtask #1 Testcase #515.73 us44 KBAcceptedScore: 0

Subtask #1 Testcase #615.37 us44 KBAcceptedScore: 0

Subtask #1 Testcase #730.258 ms3 MB + 140 KBAcceptedScore: 0

Subtask #1 Testcase #847.444 ms3 MB + 360 KBAcceptedScore: 0

Subtask #1 Testcase #932.453 ms3 MB + 232 KBAcceptedScore: 0

Subtask #1 Testcase #1020.988 ms2 MB + 120 KBAcceptedScore: 0

Subtask #1 Testcase #1121.732 ms2 MB + 160 KBAcceptedScore: 0

Subtask #1 Testcase #1237.804 ms3 MB + 296 KBAcceptedScore: 0

Subtask #1 Testcase #1337.636 ms3 MB + 500 KBAcceptedScore: 0

Subtask #1 Testcase #1447.386 ms3 MB + 260 KBAcceptedScore: 0

Subtask #1 Testcase #1546.794 ms3 MB + 276 KBAcceptedScore: 0

Subtask #1 Testcase #1637.663 ms3 MB + 296 KBAcceptedScore: 0

Subtask #1 Testcase #1737.616 ms3 MB + 424 KBAcceptedScore: 0

Subtask #1 Testcase #1838.132 ms3 MB + 424 KBAcceptedScore: 0


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