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uses crt;
var a:array[1..100]of integer;
i,n,j:integer;
kt:boolean;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
for i:=1 to n do
if trunc(sqrt(a[i]))=sqrt(a[i]) then write(a[i]:4);
writeln;
for i:=1 to n do
if a[i]>1 then
begin
kt:=true;
for j:=2 to trunc(sqrt(a[i])) do
if a[i] mod j=0 then kt:=false;
if kt=true then write(a[i]:4);
end;
writeln;
readln;
end.
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 so_hoan_hao;
var
n, tong_uoc, i: integer;
begin
writeln('Nhap vao mot so nguyen duong n:');
readln(n);
tong_uoc := 0;
for i := 1 to n-1 do
begin
if n mod i = 0 then
tong_uoc := tong_uoc + i;
end;
if tong_uoc = n then
writeln('YES')
else
writeln('NO');
end.
{PROGRAM bai_tap;
USES crt ;
VAR i , n, t:integer;
BEGIN
clrscr;
Write('Nhap n');Readln(n);
t:=0;
For i:=1 to n-1 do
if n mod i=0 then t:=t+i;
if t=n then write(n,' la so hoan chinh');
else Writeln(n,' Khong la so hoan chinh');
Readlnnline Pascal Compiler.
begin
End,
Readlnnline
END.
}
#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n/2; i++)
if (n%i==0) t=t+i;
if (t==n) cout<<"YES";
else cout<<"NO";
return 0;
}
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";
}
uses crt;
var a:array[1..100]of integer;
i,n,t,kt,j:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
t:=0;
for i:=1 to n do
if a[i] mod 2<>0 then t:=t+a[i];
writeln(t);
for i:=1 to n do
if trunc(sqrt(a[i]))=sqrt(a[i]) then write(a[i]:4);
writeln;
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.
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.
var i,j,n,d,sl:integer;
begin
write('n = ');readln(n);
for i:=1 to n do
begin
sl:=0;
for j:=1 to i do
if i mod j = 0 then
begin
d:=d+1;
if d=2 then sl:=sl+1;
end;
end;
write('Co ',sl,' so nguyen to <= ',n);
readln
end.
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