import sys
sys.setrecursionlimit(500000)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
from collections import defaultdict,deque
import bisect
import itertools
dic = defaultdict(int)
d = deque()
L,R,M = MI()
ans = 0
count = 1
cc = 1
if M <= L:
  print(0)
  exit()
for i in range(1,L+1):
  cc = (cc*i)%M
  count = (count*cc)%M
ans = count
for i in range(L+1,R+1):
  if i >= M:
    break
  else:
    cc = (cc*i)%M
    count = (count*cc)%M
    ans = (ans+count)%M
print(ans)