#include <bits/stdc++.h>

using namespace std;

long double a,b,c;

bool kt;

int main()

{

cin>>a>>b>>c;

kt=false;

if (a*a==b*b+c*c) kt=true;

if (b*b==a*a+c*c) kt=true;

if (c*c==a*a+b*b) kt=true;

if (kt==true) cout<<"YES";

else cout<<"NO";

return 0;

}

#include <bits/stdc++.h>

using namespace std;

long long n;

int main()

{

cin>>n;

if (n%2==0) cout<<"La so chan";

else cout<<"La so le";

return 0;

}

Tham khảo!

program baitap;
uses crt;
var a:integer;
procedure chanle(x:integer);
begin
     if ((x mod 2) = 0) then write('So nhap vao la so chan.') else
     write('So nhap vao la so le.');
end;
begin
     clrscr;
     write('Nhap a: ');readln(a);
     chanle(a);
     readln;

end

Bài 3: 

#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
    cin>>n;
    t=0;
    for (i=1; i<=sqrt(n); i++)
        if (i==n/i) t=t+i;
else t=t+i+n/i;
    if (t==n) cout<<"Day la so hoan hao";
    else cout<<"Day khong la so hoan hao";
    return 0;
}

#include <bits/stdc++.h>

using namespace std;

double a,b,cv,dt;

int main()

{

cin>>a>>b;

cv=(a+b)*2;

dt=a*b;

cout<<fixed<<setprecision(2)<<cv<<endl;

cout<<fixed<<setprecision(2)<<dt;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

int dv,ch,tr,n;

int main()

{

cin>>n;

dv=n%10;

ch=n/10; ch=ch%10;

tr=n/100;

cout<<dv<<endl;

cout<<ch<<endl;

cout<<tr;

return 0;

}

viet bang ngon ngu lap trinh Pascal a

#include <bits/stdc++.h>

using namespace std;

double a,b;

int main()

{

cin>>a>>b;

cout<<"a truoc khi doi la:"<<fixed<<setprecision(2)<<a<<endl;

cout<<"b truoc khi doi la:"<<fixed<<setprecision(2)<<b<<endl;

swap(a,b);

cout<<"a sau khi doi la:"<<fixed<<setprecision(2)<<a<<endl;

cout<<"b sau khi doi la:"<<fixed<<setprecision(2)<<b;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

double a,b;

int main()

{

cin>>a>>b;

cout<<fixed<<setprecision(2)<<pow((2*a+5*b),2);

return 0;

}

Chọn C