Răspuns:
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("bac.txt");
int num,a,b,cmmicnat,n,i,gasit;
int main()
{
f >> n;
f >> a >> b;
for (i=0; i<n; i++)
{
f >> num;
if (num>=0)
{
if (num>=a && num<=b)
{
if (gasit==0)
{
cmmicnat=num; gasit=1;
}
else
{
if (num<cmmicnat) cmmicnat=num;
}
}
}
}
if (gasit) cout << cmmicnat;
else cout << "NU";
return 0;
}
Explicație: