Help me in solving P2149 problem

help
,
1

My issue

t=int(input())
for i in range(t):
c=0
a,b,x=map(int,input().split())
while ab>x**2:
if a>b:
a=x-1
c+=1
if ab>x2:
b=x-1
c+=1
else:
b=x-1
c+=1
if a*b>x2:
a=x-1
c+=1
print(c)

i dont know where it is failing. normal test cases are got executed sucessfully but hidden are not. can u tell where it was error

My code

# cook your dish here
t=int(input())
for i in range(t):
    c=0
    a,b,x=map(int,input().split())
    while a*b>x**2:
        if a>b:
            a=x-1
            c+=1
            if a*b>x**2:
                b=x-1
                c+=1
        else:
            b=x-1
            c+=1
            if a*b>x**2:
                a=x-1
                c+=1
    print(c)

Problem Link: Magical World Practice Coding Problem