OJ Board

I don't understand why i'm getting wrong answer for this problem ?

#include <iostream>
#include <stdio.h>
#include <math.h>
using namespace std;

int main() {

int t;
scanf("%d",&t);
for(int c=1;c<=t;c++){
int n;
scanf("%d",&n);
printf("Case %d:",c);
for(int i=(int)sqrt(n);i>1;i--){
if(n ...