ABC_46 - A - AtCoDeerくんとペンキ / AtCoDeer and Paint Cans

#include <bits/stdc++.h>

#define SYNC ios::sync_with_stdio(0);
#define F first
#define S second
#define endl '\n'


using namespace std;

using ll = long long int;
using ii = pair<int, int>;
using vii = vector<ii>;
using vi = vector<int>;
using graph = vector<vi>;
const int INF = 0x3f3f3f3f;
const int MAXN = 58;
const ll mod = 1000000007;



int main() {
    SYNC
    int a[3], equal = 0;
    for (auto &i : a) {
        cin >> i;
    }
    for (int i = 0; i < 3; ++i) {
        for (int j = 0; j < 3; ++j) {
            if (i == j) continue;
            if (a[i] == a[j]) equal++;
        }
    }
    equal /= 2;
    int ans = 3 - equal;
    if (!ans) ans = 1;
    cout << ans << endl;


    return 0;
}