43 lines
1.1 KiB
Java
43 lines
1.1 KiB
Java
package chelper;
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import java.math.BigInteger;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Arrays;
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import io.InputReader;
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import io.OutputWriter;
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public class Day5 {
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public static String toHex(byte[] bytes) {
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BigInteger bi = new BigInteger(1, bytes);
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return String.format("%0" + (bytes.length << 1) + "x", bi);
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}
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public void solve(int testNumber, InputReader in, OutputWriter out) {
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String s = in.nextString();
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char[] res = new char[8];
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int filled = 0;
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for (int i = 0; true; i++) {
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try {
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String hash = toHex(MessageDigest.getInstance("MD5").digest((s + Integer.toString(i)).getBytes()));
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if (hash.startsWith("00000")) {
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int pos = hash.charAt(5) - '0';
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if (pos >= 0 && pos < 8 && res[pos] == 0) {
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res[pos] = hash.charAt(6);
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filled += 1;
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System.out.println(filled);
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System.out.println(new String(res));
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System.out.println();
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}
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}
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} catch (NoSuchAlgorithmException e) {
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throw new RuntimeException(e);
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}
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}
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}
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}
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