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3 years ago
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#include <iostream>
using namespace std;
int main()
{
    int a[100],b,c=0;
    for (int i = 0; i < 4; i++)
    {
        cin >> a[t];
    }
    for (int i = 0; i < 4; i++)
    {
        for (int j = i; j < 4; j++)
        {
            if (a[i] == a[j + 1])
            {
                c++;
            }
        }
    }
    if (c == 3) {
        cout << 2;
        return 0;
    }
    if (c == 6) {
        cout << 3;
        return 0;
    }
    else {
        cout << c;
        return 0;
    }
}
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