N=int(input())
def solve(N):
    if N<=0:
        a=[1, 1, -9, -19, 71, 261, -449, -3059, 1431, 32021, 17711, -302499, -479609, 2545381, 7341471, -18112339, -91527049, 89596341, 1004866831, 108903421, -9939764889][-N]
        b=10**(1-N)
    elif N==1:
        a,b=0,1
    else:
        a,b=solve(2-N)
    return a,b
a,b=solve(N)
print(a,b,sep="/")