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

A=[0]
factorial_value=1
factorial_factorial_value=1
for i in range(1,m):
    factorial_value*=i
    factorial_value%=m
    factorial_factorial_value*=factorial_value
    factorial_factorial_value%=m
    A.append(factorial_factorial_value)

ans=0
for i in range(l,min(m,r+1)):
    ans+=A[i]
    ans%=m


print(ans)