#include <bits/stdc++.h>
using namespace std;
long long n;
//chuongtrinhcon
bool ktnt(long long n)
{
    if (n<2) return(false);
    else
    for (int i=2; i*i<=n;i++)
        if (n%i==0) return (false);
    return(true);

}
//chuongtrinhchinh
int main()
{
    //freopen("KTSNT.INP","r",stdin);
    //freopen("KTSNT.OUT","w",stdout);
    cin>>n;
    if (ktnt(n)==true) cout<<"1";
    else cout<<"0";
    return 0;
}

var x, i : integer;

begin

     writeln('nhap so nguyen x : ')

     read(x);

     if ( x < 2) then writeln(' x khong phai so nguyen to');

     else if ( x > 2) then

        begin

              for i := 2 to ( x - 1) do

                  begin

                     if ( x mod i = 0) then writeln(' x khong la so nguyen to');

                  end;

        end;

    else

        writeln(' x la so nguyen to');

    readln;

end.

#include <bits/stdc++.h>
using namespace std;
long long n;
//chuongtrinhcon
bool ktnt(long long n)
{
    if (n<2) return(false);
    else
    for (int i=2; i*i<=n;i++)
        if (n%i==0) return (false);
    return(true);

}
//chuongtrinhchinh
int main()
{
    //freopen("KTSNT.INP","r",stdin);
    //freopen("KTSNT.OUT","w",stdout);
    cin>>n;
    if (ktnt(n)==true) cout<<"1";
    else cout<<"0";
    return 0;
}

Var a:integer;
Begin
Writeln('nhap mot so nguyen: '); Readln(a);
If a mod 2 = 0 then writeln(a,' la so chan')
        else writeln(a,' la so le');
End.

var a:longint;

begin

write('Nhap a = ');readln(a);

if a mod 2 = 0 then writeln(a,' la so chan')

else writeln(a,' la so le');

if a > 0 then write(a,' la so duong');

if a < 0 then write(a,' la so am');

if a = 0 then write(a,' khong am cung khong duong');

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long x,n,i,dem;

int main()

{

cin>>n;

dem=0;

for (i=1; i<=n; i++)

{

cin>>x;

if (x>0) dem++;

}

cout<<dem;

return 0;

}

Uses crt;

Var a, b, c:real;

Begin

Readln(a);

Readln(b);

Readln(c);

If (a + b > c) or (a + c > b) or (b + c > a) then writeln('tam giác')

Else writeln('Khong phai tam giac');

Readln

End.

Cau 1:

Câu 2:

#include <bits/stdc++.h>

using namespace std;

long long n;

int main()

{

cin>>n;

if (n>0 && n%5==0) cout<<"Phai";

else cout<<"Khong phai";

}