https://zerojudge.tw/ShowProblem?problemid=a884
https://onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=2443
X
Python…輸入、相減、輸出
有點水XD
n = int(input()) for _ in range(n): a, b = map(int, input(). split()) print(a-b)
CPE