from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
input = sys.stdin.readline

L,R,M = map(int,input().split())
if L>=M:
    print(0)
    exit()

f = [1]*(M+1)
for i in range(2,M+1):
    f[i] = i*f[i-1]%M

s = 1
for i in range(1,L+1):
    
    s = (s*f[i])%M

ans = s%M
for i in range(L+1,min(M+1,R+1)):
    
    s = (s*f[i])%M
    ans = (ans + s)%M
print(ans)