You cannot submit for this problem because the homework's deadline is due.

Description

Write a short C++ program which prompts the user for the current year, the user’s current age, and another year. The program should calculate the age that the user was or will be in the second year entered.

Format

Files

You should submit a tar file containing a c++ source file ex1.cpp

Input

three lines, the current year on the first, the current age on the second, and the other year
on the third

Output

one line showing the calculated age

Sample 1

Input

2018
18
2019

Output

19

Limitation

1s, 32MiB for each test case.