#include <stdio.h>
#include <conio.h>
void main()
{
int n,i,count=0;
printf("Ban hay nhap vao 1 so : ");
scanf("%d",&n);
for (i=2;i<n;i++)
{
if(n%i==0)
count++;
}
if(count==0)
printf("\n So %d la so nguyen to !!", n);
else
printf("\n So %d khong la so nguyen to !!", n);
}
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