OJ Board

/* @JUDGE_ID: 17366JM 10299 C++ "" */
#include <iostream>
#include <cmath>
using namespace std;

int num;

void solve()
{
int i, result, cnt;

result = num;
for (i = 2; i <= (int)sqrt(num); i++) {
cnt = 0;
while (num % i == 0) {
num /= i;
cnt++;
}
if (cnt != 0) {
result = result * (i - 1 ...

My code gets WA after rejudged.
Can anybody tell me what's your output for the following test case:
INPUT
1
2
3
4
5
6
7
8
9
10
123456789
987654321
1000000000
0

OUTPUT
0
1
2
2
4
3
6
4
6
5
121225
114414401
400000000