l,r,m = map(int, input().split())
z = 1
k = 1
for i in range(1, l + 1):
    z *= i
    k *= z
    if k % m == 0:
        print(0)
        exit()
f = k
if f % m == 0:
    print(0)
    exit()
count = 0
prev = -1
for i in range(l + 1, r + 1):
    z *= i
    k *= z
    f += k
    r = f%m
    if prev == r:
        count += 1
    else:
        count = 0
    if count > 100:
        print(r)
        exit()
    prev = r
print(f%m)