#include< conio.h >
#include
#include< math. h>
int main(){
int n;
do{
printf("Nhap n = ");
scanf("%d",&n);
if(n<=0)
printf("Ban da nhap sai vui long nhap lai.");
}while(n<=0);
float x=sqrt((float)n);
int y=x;
if(y==x){
printf("Day la so chinh phuong");
}
else {
printf("Day khong phai la so chinh phuong");
}
return(0);
}

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