def fac(n, m):
    if n > 1:
        n *= fac(n - 1, m)
        if n >= m:
            n %= m
        return n
    else:
        return 1

L, R, M = map(int, input().split())

if L >= M:
    print(0)
    exit()

facto = 1
index = 2
while facto != 0:
    facto *= fac(index, M)
    if facto >= M:
        facto %= M
    index += 1

ans = 0
for i in range(L, index):
    a = 1
    for j in range(1, i + 1):
        a *= fac(j, M)
        if a >= M:
            a %= M
    ans += a
    if ans >= M:
        ans %= M

print(ans)