A题:
A. Drazil and Date
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
Someday, Drazil wanted to go on date with Varda. Drazil and Varda live on Cartesian plane. Drazil's home is located in point(0, 0) and Varda's home is located in
point (a, b). In each step, he can move in a unit distance in horizontal or vertical direction. In other words, from position (x, y) he
can go to positions (x + 1, y), (x - 1, y), (x......
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