public boolean lastDigit(int a, int b, int c) {
  int lastA = a % 10;
  int lastB = b % 10;
  int lastC = c % 10;

  if (lastA == lastB) {
    return true;
  }
  else if (lastA == lastC) {
    return true;
  }
  else if (lastB == lastC) {
    return true;
  }
  else {
    return false;
  }
}

public boolean lastDigit(int a, int b, int c) {
  int lastA = a % 10;
  int lastB = b % 10;
  int lastC = c % 10;

  if (lastA == lastB || lastA == lastC || lastB == lastC) {
    return true;
  }
  else {
    return false;
  }
}

public boolean lastDigit(int a, int b, int c) {
  int lastA = a % 10;
  int lastB = b % 10;
  int lastC = c % 10;

  return lastA == lastB || lastA == lastC || lastB == lastC;
}