Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
program SoHoanHao;
uses crt;
var
i, j, n, s: integer;
begin
clrscr;
write('Nhap n: ');
readln(n);
for i := 1 to n do
begin
s := 0;
for j := 1 to i - 1 do
begin
if i mod j = 0 then
s := s + j;
end;
if s = i then
writeln(i);
end;
readln;
end.
2:
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n,i,kt=0;
cin>>n;
for (int i=2; i*i<=n; i++)
if (n%i==0) kt=1;
if (kt==0) cout<<"YES";
else cout<<"NO";
}
Bài 2:
#include <bits/stdc++.h>
using namespace std;
long long x,y;
int main()
{
cin >>x>>y;
cout<<x<<" "<<y;
swap(x,y);
cout<<x<<" "<<y;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long i,n;
int main()
{
cin>>n;
for (i=1; i<=n; i++) if (i%3==0) cout<<i<<" ";
return 0;
}
uses crt;
var n,i,kt,j,t:integer;
begin
clrscr;
write('Nhap n='); readln(n);
writeln('Cac so nguyen to trong khoang tu 2 toi ',n,' la: ');
for i:=2 to n do
begin
kt:=0;
for j:=2 to i-1 do
if i mod j=0 then kt:=1;
if kt=0 then write(i:4);
end;
writeln;
writeln('Cac so chinh phuong trong khoang tu 0 toi ',n,' la: ');
for i:=0 to n do
if trunc(sqrt(i))=sqrt(i) then write(i:4);
writeln;
writeln('Cac so hoan hao trong khoang tu 1 toi ',n,' la: ');
for i:=1 to n do
begin
t:=0;
for j:=1 to i-1 do
if i mod j=0 then t:=t+j;
if t=i then write(i:4);
end;
readln;
end.
program bai_toan;
var
N, i, sum: integer;
begin
write('Nhap so N: ');
readln(N);
write('Cac uoc cua ', N, ' khong ke ', N, ' la: ');
for i := 1 to N - 1 do
if N mod i = 0 then
write(i, ' ');
writeln;
sum := 0;
for i := 1 to N - 1 do
begin
if N mod i = 0 then sum := sum + i;
end;
if sum = N then writeln(N, ' la so hoan hao')
else writeln(N, ' khong phai la so hoan hao');
writeln;
writeln('Tat ca so hoan hao trong pham vi 1 -> ', N, ' la:');
for i := 1 to N do
begin
sum := 0;
for j := 1 to i - 1 do
begin
if i mod j = 0 then sum := sum + j;
end;
if sum = i then writeln(i);
end;
readln;
end.