#include <iostream>
#include <cassert>
using namespace std;
int main(){
	int a,b,c;
	cin >> a >> b >> c;
	assert(1<=a&&a<=1000);
	assert(1<=b&&b<=1000);
	assert(1<=c&&c<=1000);
	int ans = 0;
	for(int p=1; p<5000; p++){
		ans += a%p!=c%p && (((a%p<b%p) && (b%p>c%p)) || ((a%p>b%p) && (b%p<c%p))) ;
	}
	if(ans>2000) cout << "INF" << endl;
	else cout << ans << endl;
	return 0;
}