Part 3 Boolean 2-d arrays You can make an array of boolean values. In this case a true is represented by a * and it represents this row is friends with this column. For example friend 0 is friends with 1,3,4. 0 1 2 3 4 0 FALSE TRUE FALSE TRUE TRUE 1 TRUE FALSE TRUE FALSE TRUE 2 FALSE TRUE FALSE FALSE FALSE 3 TRUE FALSE FALSE FALSE TRUE 4 TRUE TRUE FALSE TRUE FALSE Make the above array - easiest way is probably to use nested loops to set all the values to false - then update the true values like friends[0][1]=true and friends [1][0]=true. Now write code to count the friend pairs.(in the above code the answer is 6 pairs)