# M<10**6で、L, R < 10**18
# しかしMを超えれば余りはゼロになる
# つまり計算はMまででいい

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

# nCrメモ化パッケージ
factorial = [1] #0分
inverse = [1] #0分
for i in range(1, N+1):
    factorial.append(factorial[-1]*i%mod)
    inverse.append(pow(factorial[-1], mod-2, mod))

# パッケージだからあるけど今回は使わないnCr_fast
def nCr_fast(N, R, MOD):
    if N < R or R < 0:
        return 0
    elif R == 0 or R == N:
        return 1
    return factorial[N]*inverse[R]*inverse[N-R]%MOD

factorial_factorial = [1]
for i in range(1, N+1):
    factorial_factorial.append(factorial_factorial[-1]*factorial[i]%mod)

if L >= M:
    ans = 0
elif L < M and R >= M:
    ans = 0
    for i in range(L, M+1):
        ans += factorial_factorial[i]
        ans %= mod
elif L < M and R < M:
    ans = 0
    for i in range(L, R+1):
        ans += factorial_factorial[i] 
        ans %= mod
print(ans)