Răspuns:
1.
#include<bits/stdc++.h>
using namespace std;
int main()
{
ifstream f("date.in");
ofstream g("date.out");
int n,nr=0;
f>>n;
for(int i=1;i*i<=n;i++)
{
if(i*i==n)
{
if((i%100)/10==8)
{
g<<i<<" ";
nr++;
}
}
else if(i*i!=n and n%i==0)
{
if((i%100)/10==8)
{
g<<i<<" ";
nr++;
}
if(((n/i)%100)/10==8)
{
g<<n/i<<" ";
nr++;
}
}
}
if(nr==0)
g<<-1;
return 0;
}
2.
#include<bits/stdc++.h>
using namespace std;
int main()
{
ifstream f("date.in");
ofstream g("date.out");
int n;
f>>n;
for(int i=1;i*i<=n;i++)
{
if(i*i==n)
if((i/10)==0)
g<<i<<" ";
else if(i*i!=n and n%i==0)
{
if((i/10)==0)
g<<i<<" ";
if(((n/i)/10)==0)
g<<n/i<<" ";
}
}
return 0;
}
3.
#include<bits/stdc++.h>
using namespace std;
int main()
{
ifstream f("date.in");
ofstream g("date.out");
int n;
f>>n;
for(int i=1;i*i<=n;i++)
{
if(i*i==n and i%2==1)
g<<i<<",";
else if(i*i!=n and n%i==0)
{
if(i%2==1)
g<<i<<",";
if((n/i)%2==1)
g<<i<<",";
}
}
return 0;
}
Explicație:
