n,q=list(map(int,input().split()))
a=list(map(int,input().split()))
for _ in range(n):
    t,k,y=list(map(int,input().split()))
    if t==0:
        a[x-1]=y
    elif a[1:y-1].count('1')%2==0:
        print("F")
    else:
        print("S")