标签:字符串 ace int == space code names 模板 return
关于kmp : https://www.cnblogs.com/roccoshi/p/13096988.html
关于kmp, 想了很久, 我觉得不应该放在这里写, 另开一贴记录一下.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<int> getnext(string s) {
vector<int> next;
next.push_back(-1);
int i = 0, j = -1;
while(i < s.size()) {
if(s[i] == s[j] || j==-1) {
i++;
j++;
next.push_back(j);
}
else {
j = next[j];
}
}
return next;
}
vector<int> kmp(string s1, string s2) { // kmp : 找出s2在s1中出现的位置(全部)
vector<int> next = getnext(s2);
vector<int> ans;
int i = 0, j = 0; // i指s1, j指s2
while(i < s1.size()) {
if(s1[i] == s2[j] || j==-1) {
if(j == s2.size()-1) {
ans.push_back(i - j);
j = next[j];
}
else {
i++;
j++;
}
}
else {
j = next[j];
}
}
return ans;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
string s;
string s1;
cin >> s >> s1;
vector<int> ans = kmp(s,s1);
vector<int> next = getnext(s1);
for (int i = 0; i < ans.size(); ++i) {
cout << ans[i] + 1 << endl;
}
for (int i = 1; i < next.size(); ++i)
{
cout << next[i] << " ";
}
return 0;
}
[每日一题2020.06.12]P3375 【模板】KMP字符串匹配
标签:字符串 ace int == space code names 模板 return
原文地址:https://www.cnblogs.com/roccoshi/p/13096925.html