uses crt;

var i,n,t,j,kt:integer;

begin

clrscr;

readln(n);

t:=0;

for i:=2 to n do

if n mod i=0 then

begin

kt:=0;

for j:=2 to trunc(sqrt(i)) do

if i mod j=0 then kt:=1;

if kt=0 then t:=t+i;

end;

write(t);

readln;

end.

cảm ơn bn đã giúp mik nhiều bn thông cảm

#include <bits/stdc++.h>

using namespace std;

int main () { int a[1000],n,i;

cin >> n;

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

cin >> a[i];

for (int i=2;i<=n;i++)

if (((a[i]<0) and (a[i-1]<0)) or ((a[i]>0) and (a[i-1]>0))) {

cout << a[i-1] <<" " << a[i];

break; }

return 0;

}

#include <iostream>
using namespace std;
int main()
{
    int t,m,n,ucln;
    cout<<"Nhap n="; cin>>n;
    cout<<"Nhap m="; cin>>m;
    t=m%n;
    while (t!=0)
    {
        t=n%m;
        n=m;
        m=t;
    }
    ucln=n;
    cout<<ucln;
    return 0;
}

uses crt;

var x,n,d,i:longint;

st,st1:string;

a:integer;

{----------------------chuong-trinh-con-tim-ucln---------------------}

function ucln(a,b:longint):longint;

var t:longint;

begin

   t:=b mod a;

   while t<>0 do

     begin

        t:=a mod b;

        a:=b;

        b:=t;

     end;

  ucln := a;

end;

{-------------------chuong-trinh-chinh-----------------}

begin

clrscr;

write('nhap x='); readln(x);

str(x,st);

d:=length(st);

st1:='';

for i:=d downto 1 do

  st1:=st1+st[i];

val(st1,n,a);

if ucln(x,n)=1 then writeln('Phai')

else writeln('khong phai');

readln;

end.

uses crt;

var n,i,dem,j,t:integer;

kt:boolean;

begin

clrscr;

readln(n);

t:=0;

for i:=2 to n do 

begin

kt:=true;

for j:=2 to i-1 do 

  if i mod j=0 then kt:=false;

if kt=true then 

begin

write(i:4);

t:=t+i;

end;

end;

writeln;

writeln(t);

readln;

end.

câu 1

Program Nguyen_to;

Var n,i:integer;

Function NT(n:integer):Boolean;

Var ok: Boolean;

i: integer;

Begin ok:=true;

for i:=2 to n-1 do if (n mod i)= 0 then ok:=ok and false;

if n < 2 then NT:=false else NT:=ok;

End;

Begin Write('Nhap n: ');

Readln(n); i:=n;

Repeat i:=i+1;

Until NT(i);

Write('So nguyen to nho nhat lon hon ',n, 'la: ',i);

Readln End.

câu 2

uses crt;

const so: set of char=['0','1','2','3','4','5','6','7','8','9'];

var a:array[1..100] of integer;

st,b:string;

c,l,i,n,j:integer;

s, Max: integer;

begin clrscr;

write('Nhap xau:');

readln(st);

l:=length(st);

i:=1;

n:=0;

repeat if (st[i] in so) then begin b:='';

repeat b:=b+st[i];

inc(i);

until (not(st[i] in so)) or (i>l);

inc(n);

val(b,a[n],c);

end;

inc(i);

until i>l;

Max:=a[1];

for i:=2 to n do If Max<A[i] Then Max:=A[i];

Writeln('Phan tu lon nhat cua mang:', Max);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long n,i,x,t,dem,j;

int main()

{

cin>>n;

x=n;

t=0;

while (n>0)

{

t=t+n%10;

n=n/10;

}

cout<<t;

dem=0;

for (i=2; i<=x; i++)

{

bool kt=true;

for (j=2; j*j<=i; j++)

if (i%j==0) kt=false;

if (kt==true) dem++;

}

cout<<dem;

return 0;

}

Em ghi lại cho đúng cái đề nhé

uses crt;

var a:array[1..10000]of integer;

i,n,kt,j:integer;

begin

clrscr;

readln(n);

for i:=1 to n do readln(a[i]);

for i:=1 to n do 

  if a[i]>1 then 

begin

kt:=0;

for j:=2 to trunc(sqrt(a[i])) do 

  if a[i] mod j=0 then kt:=1;

if kt=0 then write(a[i]:4);

end;

readln;

end.