c#include <bits/stdc++.h> using namespace std; int main(){ cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(false); vector<int> num(3); cin >> num[0] >> num[1] >> num[2]; sort(num.begin(), num.end()); if (num[0] + num[1] == num[2]) cout << 1 << "\n"; else if (num[0] * num[1] == num[2]) cout << 2 << "\n"; else cout << 3 << "\n"; return 0; }