#include <bits/stdc++.h>
template<class T> inline bool chmin(T&a, T b){if(a > b){a = b; return true;}else{return false;}}
template<class T> inline bool chmax(T&a, T b){if(a < b){a = b; return true;}else{return false;}}
#define ll long long
#define double long double
#define rep(i,n) for(int i=0;i<(n);i++)
#define REP(i,n) for(int i=1;i<=(n);i++)
#define mod (ll)(1e9+7)
#define inf (ll)(3e18+7)
#define eps (double)(1e-9)
#define pi (double) acos(-1)
#define P pair<int,int>
#define PiP pair<int,pair<int,int>>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;

int main() {
    ll a, b, c;
    cin >> a >> b >> c;
    map<ll, ll> mpa, mpb;
    vector<ll> veca = {0}, vecb = {0};
    ll now;
    now = a;
    mpa[0] = 1; mpb[0] = 1;
    while(!mpa[now%c]){
        mpa[now%c] = 1;
        veca.push_back(now);
        now += a;
    }
    now = b;
    while(!mpb[now%c]){
        mpb[now%c] = 1;
        vecb.push_back(now);
        now += b;
    }
    vector<ll> ans(c, inf);
    rep(i, veca.size())rep(j, vecb.size()){
        ll m = (veca[i] + vecb[j]) % c;
        chmin(ans[m], veca[i]+vecb[j]); 
    }
    ll sum = 0;
    bool ok = true;
    rep(i, c){
        if(ans[i] == inf)ok = false;
        else sum += ans[i]/c;
    }
    if(ok)cout << sum << endl;
    else cout << "INF" << endl;
}