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https://github.com/tiennm99/codeforces.git
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19 lines
302 B
C++
19 lines
302 B
C++
#include <iostream>
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using namespace std;
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int main()
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{
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unsigned int a, b, c, d;
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cin >> a >> b >> c >> d;
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unsigned count = 0;
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if (a == b || a == c || a == d)
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count++;
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if (b == c || b == d)
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count++;
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if (c == d)
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count++;
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cout << count;
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return 0;
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}
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