判断是不是子字符串

import java.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Solver solver = new Solver();
        solver.solve(in, out);
        out.close();
    }
    public static boolean isSubsequence(String s, String t) {
        int index = -1;
        char []s1 = s.toCharArray();
        for(char c:s1) {
            index = t.indexOf(c,index+1);
            if(index == -1) {
                return false;
            }
        }
        return true;
    }

    static class Solver {
        public void solve(InputReader in, PrintWriter out) {
            Scanner sc = new Scanner(System.in);
            String s = sc.next();
            String t = sc.next();
            boolean flag = isSubsequence(s, t);
             System.out.println(flag);

        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

    }

}