#include "bits/stdc++.h"
using namespace std;

using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = 998244353;
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	ll A, B, C; cin >> A >> B >> C;
	vector<bool>ok(4010 * 4010 + 100);
	for (int i = 0; i <= 4010; i++) {
		for (int j = 0; j <= 4010; j++) {
			ll now = A * i + B * j;
			for (int k = now; k <= 4010 * 4010; k += C) {
				if (ok[k])break;
				ok[k] = true;
			}
		}
	}
	int cnt = 0;
	for (int i = 1; i <= 4010*4010; i++) {
		if (!ok[i]) {
			cnt++;
			if (i > 2000 * 2000) {
				cout << "INF" << endl; return 0;
			}
			//cout << i << endl;
		}
	}
	cout << cnt << endl;
	return 0;
}