answer using C$++$

Consider this data sequence: $"311555246673-8".$ Any value that is the same as the immediately preceding value is considered a CONSECUTIVE DUPLICATE. In this example, there are three such consecutive duplicates: the $2$nd and $3$rd $5$s and the second $6.$ Note that the last $3$ is not a consecutive duplicate because it was preceded by a $7.$ Write some code that uses a loop to read such a sequence of non$-$negative integers, terminated by a negative number. When the code exits the loop it should print the number of consecutive duplicates encountered. In the above case, that value would be $3.$