#import math
def main():
    N = int(input())
    total = 1
    for x in range(1, N + 1):
        total *= x
    #if int(math.log10(total) + 1) > 12:
    if total >= 10 ** 11:
        a = list(str(total))
        for x in range(len(a) - 12, len(a)):
            print(a[x], end = "")
    else:
        print(total)

if __name__ == "__main__":
    main()