Why don't I pass the third requirement?

package com.codegym.task.task04.task0428;
/*
Positive number
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = Integer.parseInt(reader.readLine());
int count = 0;
if (a > 0) {
count ++;
if (b > 0) {
count ++;
if (c > 0) {
count ++;
}
}
}
else if (b > 0) {
count ++;
if (c > 0) {
count ++;
}
}
else if (c > 0)
count ++;
System.out.println(count);
}
}