import bisect
import copy
import decimal
import fractions
import heapq
import itertools
import math
import random
import sys
import time
from collections import Counter,deque,defaultdict
from functools import lru_cache,reduce
from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max
def _heappush_max(heap,item):
    heap.append(item)
    heapq._siftdown_max(heap, 0, len(heap)-1)
def _heappushpop_max(heap, item):
    if heap and item < heap[0]:
        item, heap[0] = heap[0], item
        heapq._siftup_max(heap, 0)
    return item
from math import gcd as GCD
read=sys.stdin.read
readline=sys.stdin.readline
readlines=sys.stdin.readlines
write=sys.stdout.write

L,R,M=map(int,readline().split())
fact=[1]*(M+1)
for m in range(1,M+1):
    fact[m]=fact[m-1]*m
    fact[m]%=M
for m in range(1,M+1):
    fact[m]*=fact[m-1]
    fact[m]%=M
L=min(L,M+1)
R=min(R,M+1)
ans=sum(fact[L:R])%M
print(ans)