#include <iostream>
using namespace std;
int main() {
int a, b, c , d;
cin>>a>>b>>c>>d;
int primero;
if(a<b && a<c && a<d)
{
int primero=a;
}
else if (b<a && b<c && b<d)
{
int primero=b;
}
else if (c<a && c<b && c<d)
{
int primero=c;
}
else if (d<a && d<b && d<c)
{
int primero=d;
}
cout<<primero;
return 0;
}
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