Răspuns:
1.#include <iostream>
using namespace std;
int main()
{
int n;
cout<<"n=";
cin>>n;
bool ok;
if(n==0)
ok=true;
int nrpar=0,nrimpar=0;
while(n!=0)
{
if(n%10%2==0)
nrpar++;
else if(n%10%2==1)
nrimpar++;
n=n/10;
}
if(ok==true)
cout<<"Nu";
else
{
if(nrpar==nrimpar)
cout<<"Da";
else
cout<<"Nu";
}
}
2.#include <iostream>
using namespace std;
int main()
{
int n;
cout<<"n=";
cin>>n;
int copie;
copie=n;
int nr=0;
while(copie!=0)
{
nr++;
copie=copie/10;
}
int p=1;
while(nr!=0)
{
p=p*10;
nr--;
}
n=(9*p+n)*10+9;
cout<<n;
}
3.#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int a,b,c;
cout<<"a=";
cin>>a;
cout<<"b=";
cin>>b;
cout<<"c=";
cin>>c;
if(a==b==c or a==b or b==c)
cout<<"Nu";
else
{
if(max(max(a,b),c)==c)
cout<<"Da";
else
cout<<"Nu";
}
}
Explicație:
