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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cifra maxima.in");
ofstream g("cifra maxima.txt");
int main()
{
int n, cifmax=0;
cout<<"n= "; cin>>n; g<<"n= "<<n<<endl;
while(n%10>cifmax)
{
cifmax=n%10;
n=n/10;
}
cout<<cifmax;
while(n%10>cifmax)
{
cifmax=n%10;
n=n/10;
}
g<<cifmax;
return 0;
}
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