changes of coin code

You have x no. of 5 rupee coins and y no. of 1 rupee coins. You want to purchase an item for amount z. The shopkeeper wants you to provide exact change. You want to pay using minimum number of coins. How many 5 rupee coins and 1 rupee coins will you use? If exact change is not possible then display -1.

Sample Input			Expected Output
Available Rs. 1 coins	Available Rs. 5 notes	Amount to be made	Rs. 1 coins needed	Rs. 5 notes needed
2	4	21	1	4
11	2	11	1	2
3	3	19	-1

SOLUTION: