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diff --git a/‎src/leetcode2018/CountBinarySubstrings.java
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+23Lines changed: 23 additions & 0 deletions b/‎src/leetcode2018/CountBinarySubstrings.java
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+23Lines changed: 23 additions & 0 deletions
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+package leetcode2018;
+
+public class CountBinarySubstrings {
+
+	 public int countBinarySubstrings(String s) {
+		int t=0;
+		for(int i =0; i< s.length(); i++){
+		    int n=i+1;
+		    while(n< s.length() && s.charAt(n) == s.charAt(i)){
+		       n++;    
+		    }
+		    int m=n+1;
+		    while(m< s.length() && s.charAt(m) == s.charAt(n)){
+		        m++;
+		    }
+		    if((n-i)==(m-n)){
+		        t++;
+		    }            
+		}
+		return t;
+	 }
+
+}