import sequtils,strutils
var
    N = stdin.readline.parseInt
    P = newSeq[int64](0)
    ans : int64
if N == 1:
    echo 1
else:
    var b = 100000
    while P.len < 6:
        b += 1
        var f = false
        for i in 2..1000:
            if b mod i == 0:
                f = true
                break
        if not f:
            P.add(b.int64)
    var cnt = 1

    for i in 0..6:
        for j in 0..i:
            cnt += 1
            if cnt == N:
                ans = P[i] * P[j]
echo ans