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

    if L>M:
        L=M
    elif R>M:
        R=M

    fact=[1]*(M+1)
    for i in range(1,M+1):
        fact[i]=i*fact[i-1]%M

    prod=[1]*(M+1)
    for i in range(1,M+1):
        prod[i]=fact[i]*prod[i-1]%M

    X=0
    for i in range(L,R+1):
        X+=prod[i]
    return X%M

#==================================================
print(solve())