#include<stdio.h>
#include <math.h>
int main ()
{
int n,i=1;
float S=0;
printf(“nhap n=”);
scanf (“%d”,&n);
while(i<=n)
{
S+=(i*i);
i++;
}
printf (“tong = %d”,S);
}
#include<stdio.h>
#include <math.h>
int main ()
{
int n,i=1;
float S=0;
printf(“nhap n=”);
scanf (“%d”,&n);
while(i<=n)
{
S+=(i*i);
i++;
}
printf (“tong = %d”,S);
}