import sys
for s in sys.stdin:
    #start
    a,b,c=map(int,input().split())
    if b+c<=a or (a+c>b and a<b and a>c) or (a+b>c and c>a and a>b):
        print('A')
    if a+c<=b or (b+c>a and b<a and b>c) or (b+a>c and c>b and b>a):
        print('B')
    if a+b<=c or (c+a>b and c<b and c>a) or (c+b>a and a>c and c>b):
        print('C')

為何要輸入兩次阿，答案還錯...

for s in sys.stdin:
    #start
    a,b,c=map(int,input().split())

input()改成s