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#165. 【模板】KMP 字符串匹配

Browse Source 
https://sjzezoj.com/submission/74730
This commit is contained in:
Baoshuo Ren 2023-03-30 08:38:49 +08:00
parent 6967e637f1
commit ad980d856c
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
1 changed files with 25 additions and 14 deletions
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39
S2OJ/165/165.cpp
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@ -1,28 +1,39 @@
#include <iostream>
#include <string>
using std::cin;
using std::cout;
const char endl = '\n';
int nxt[1000005];
std::string s, p;
const int N = 1e6 + 5;
int next[N];
std::string s1, s2;
int main() {
cin >> s >> p;
nxt[0] = -1;
for (int i = 1, j = -1; i < p.size(); i++) {
while (j >= 0 && p[j + 1] != p[i]) j = nxt[j];
if (p[j + 1] == p[i]) j++;
nxt[i] = j;
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> s1 >> s2;
next[0] = -1;
for (int i = 1, j = -1; i < s2.size(); i++) {
while (~j && s2[j + 1] != s2[i]) j = next[j];
if (s2[j + 1] == s2[i]) j++;
next[i] = j;
}
for (int i = 0, j = -1; i < s.size(); i++) {
while (j != -1 && s[i] != p[j + 1]) j = nxt[j];
if (s[i] == p[j + 1]) j++;
if (j == p.size() - 1) {
for (int i = 0, j = -1; i < s1.size(); i++) {
while (~j && s1[i] != s2[j + 1]) j = next[j];
if (s1[i] == s2[j + 1]) j++;
if (j + 1 == s2.size()) {
cout << i - j + 1 << endl;
j = nxt[j];
}
}
return 0;
}