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- #include<bits/stdc++.h>
- using namespace std;
- int main(){
- ios_base::sync_with_stdio(0);
- cin.tie(0);
- string w, s;
- cin >> w >> s;
- s = w + '#' + s;
- int n = s.size(), k = w.size();
- vector<int> p(n), v;
- for(int i = 1;i < n;i++){
- int j = p[i - 1];
- while(j > 0 && s[i] != s[j])
- j = p[j - 1];
- if(s[i] == s[j])
- j++;
- p[i] = j;
- if(j == k)
- v.push_back(i - 2 * k + 1);
- }
- cout << v.size() << '\n';
- for(auto i : v)
- cout << i << ' ';
- }
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