#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;


int main() {

	int a, b, c;
	cin >> a >> b >> c;
	int r = 0;
	if(a!=c&& ((b < a&&b < c) || (b > a&&b > c))) {
		cout << "INF" << endl; return 0;
	}
	int t = max(a, max(b, c));
	for (int i = 3; i <= t; i++)
		if (a%i != c%i) {
			if (b%i < a%i&&b%i < c%i)r++;
			else if (b%i > a%i&&b%i > c%i)r++;
		}
		cout << r << endl;
	return 0;


}