Finally got this one. Have to update n and b, simultaneously, after computing their new values.

100/Reset.java

@@ -0,0 +1,20 @@
+import java.math.BigInteger;
+public class Reset {
+	public static void main(String[] args) { 
+		long b = 85;
+		long n = 120;
+		long L = (long)(1E12);
+
+		while(n<=L) { 
+
+			long newb = 3*b + 2*n - 2;
+			long newn = 4*b + 3*n - 3;
+			b = newb;
+			n = newn;
+		}
+
+		System.out.println(L);
+		System.out.println(b);
+	}
+}
+