#include <iostream>
using namespace std;
int countZeros(int a, int b, int c, int d)
{
return int(a == 0) + int(b == 0) + int(c == 0) + int(d == 0);
}
int main() {
int varA = 1, varB = 0, varC = 3, varD = 0;
std::cout << countZeros(varA, varB, varC, varD);
return 0;
}
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