python/TangDou/Topic/Test.cpp

#include <bits/stdc++.h>

using namespace std;
const int N = 1000010;
int n, m, ne[N];
char s[N], p[N];

int main() {
    cin >> n >> (p + 1) >> m >> (s + 1);

    // 求模式串ne数组
    for (int i = 2, j = 0; i <= n; i++) {
        while (j && p[i] != p[j + 1]) j = ne[j];
        if (p[i] == p[j + 1]) j++;
        ne[i] = j;
    }

    // 求源串中模式串出现的每个位置
    for (int i = 1, j = 0; i <= m; i++) {
        while (j && s[i] != p[j + 1]) j = ne[j];
        if (s[i] == p[j + 1]) j++;
        if (j == n) {
            printf("%d ", i - n);
            j = ne[j]; // 继续搜索，重置 j=ne[j]
        }
    }
    return 0;
}