题解 | 【模板】分数四则运算

import sys
import math
n=int(input())
data=list(sys.stdin.read().splitlines())
for i in range(n):
    a,b,op,c,d = map(int,data[i].split())
    if b==0 or d==0:
        print("inf")
        continue
    else:
        denominator = b*d
        if op==1:
            numberator=a*d+b*c
        elif op==2:
            numberator=a*d-b*c
        elif op==3:
            numberator=a*c
        else:
            if c==0:
                print("inf")
                continue
            denominator=b*c
            numberator=a*d

        #通分
        com=math.gcd(denominator,numberator)
        num = numberator//com
        den = denominator//com
        #只要分母小于0，分子分母都取反
        if  den<0:
            num=-num
            den=-den
        print(num,den)