l, r, m = map(int, input().split())

if m <= l:
    print(0)
    exit()
ans = 0
res = 1
f = 1
for i in range(2, l + 1):
    res *= i ** (l - i + 1)
    res %= m
    f *= i
    f %= m
for i in range(l, min(r + 1, m)):
    ans += res
    ans %= m
    f *= i + 1
    f %= m
    res *= f
    res %= m
print(ans)