def main():
    import sys
    input = sys.stdin.read().split()
    N = int(input[0])
    total = 0

    # Case 2: p from 2 to 9
    for p in range(2, 10):
        required = p * p - 1
        count = 0
        for a in range(p):
            for b in range(p):
                if a == b:
                    continue
                if (p * a + b) * N > required:
                    count += 1
        total += count

    # Case 1: p >= 10, a and b from 0-9, a != b
    for a in range(10):
        for b in range(10):
            if a == b:
                continue
            Na = N * a
            Nb = N * b + 1
            low = 10
            high = 10**9
            best = 0
            while low <= high:
                mid = (low + high) // 2
                lhs = mid * mid
                rhs = Na * mid + Nb
                if lhs < rhs:
                    best = mid
                    low = mid + 1
                else:
                    high = mid - 1
            if best >= 10:
                total += best - 10 + 1

    print(total)

if __name__ == "__main__":
    main()