// nhap n, tim cac so chinh phuong tu 1 den n
#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
int n,i,j;
printf("Nhap n = "); scanf("%d",&n);
printf("Cac so chinh phuong tu 1 den %d la:",n); for(i=1;i<=n;i++){
for(j=1;j<=i;j++){
if (j==sqrt(i))
printf (" %d",i);
} }
return 0;
}