import sys

index = 0
for line in sys.stdin:
    a = line.split()
    # print(a)
    if index == 0:
        group_num = int(a[0])
    else:
        print(int(a[0])+int(a[1]))
    index += 1

用 index 记录读到的行数，并条件判断执行即可