1994B - Fun Game - CodeForces Solution

def judge(n,s,t):
    if s==t:
        return 1
                s1=n+1
    t1=n+1
    for i in range(1,n+1):
        if s1==n+1 and s[i]==1:
            s1=i
        if  t1==n+1 and t[i]==1:
            t1=i
        if s1!=n+1 and t1!=n+1:
            break
    if s1<=t1:
        return 1
    else:
        return 0
            


q=int(input())
for _ in range(q):
    n=int(input())
    s=[0]+list(map(int,input()))
    t=[0]+list(map(int,input()))
        ans=judge(n,s,t)
    if ans:
        print("YES")
    else:
        print("NO")