r=range
L,R,M=map(int,input().split())
b=1
for i in r(L):
	b=(b*pow(i+1,L-i,M))%M
	if b<1:break
a=b
for i in r(L+1,R):
	if b<1:break
	for j in r(1,i+1):b=(b*j)%M
	a+=b
print(a%M)