I'm trying to solve the problem C http://codeforces.net/gym/101350/status/C but I don't understand why did I got TLE on test 2, while I used O(n) solution. Can anyone help me explaining it?

T=int(input())

def f(a,b): if b==0: return a return f(b,a%b)

for i in range(T): N=int(input()) L=[int(x) for x in input().split()] m=L[0] ans=m for i in range(1,len(L)): m=f(m,L[i]) ans+=L[i]

print(str(ans)+" "+str(m))