Задачі для початківців -01
Vlad wants to take for lunch a couple of fruits. He has a different bananas, b different apples and c different pears. In how many ways can he choose 2 different fruits from available?
Three non-negative integers are given: a, b and c. All integers do not exceed
Print the number of ways to choose 2 different fruits for a lunch.
3 4 2