class Solution {
  public int countBinarySubstrings(String s) {
    int currValueCount = 1;
    int prevValueCount = 0;
    int count = 0;
    for (int i = 1; i < s.length(); i++) {
      if (s.charAt(i) == s.charAt(i - 1)) {
        currValueCount++;
      } else {
        prevValueCount = currValueCount;
        currValueCount = 1;
      }
      if (prevValueCount >= currValueCount) {
        count++;
      }
    }
    return count;
  }
}