题解 | #String Matching#

//Java版代码
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String t = sc.next();
        String p = sc.next();
        int count = 0;
        int pos = 0;
        while (pos != -1) {
            pos = t.indexOf(p, pos);
            if (pos != -1) {
                count++;
                pos++;
            }
        }
        System.out.println(count);
    }
}
#Python版代码
import re
t, p = input().split()
pattern = '(?=' + p + ')'
count = len(re.findall(pattern, t))
print(count)