CoprimeSubstrings.java

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.io.InputStream;

/**
 * @author MaxHeap
 */
public class CoprimeSubstrings {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        FastReader in = new FastReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        CoprimeSubstrings solver = new CoprimeSubstrings();
        solver.solve(1, in, out);
        out.close();
    }

    static class CoprimeSubstrings {
        public void solve(int testNumber, FastReader in, PrintWriter out) {
            int t = in.nextInt();
            while (t-- > 0) {
                int n = in.nextInt();
                long m = in.nextLong();
                String s = in.next();
                ArrayList<Long> list = new ArrayList<>();
                for (int i = 0; i < n; i++) {
                    long counter = 0;
                    for (int j = i; j < n; j++) {
                        counter = counter * 10 + (s.charAt(j) - '0');
                        counter %= m;
                        list.add(counter);
                    }
                }
                int ans = 0;
                for (long temp : list) {
                    if (Utils.gcd(temp, m) == 1) ans++;
                }
                out.println(ans);
            }
        }

    }

    static class Utils {
        public static long gcd(long a, long b) {
            if (b != 0)
                return gcd(b, a % b);
            return a;
        }

    }

    static class FastReader {
        BufferedReader reader;
        StringTokenizer st;

        public FastReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream));
            st = null;
        }

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

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

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

    }
}