Problem:
Problem Statement

You are given two integers a and b (a≤b). Determine if the product of the integers a, a+1, …, b is positive, negative or zero.

Constraints

a and b are integers.

-10^9≤a≤b≤10^9

Partial Score

In test cases worth 100 points, -10≤a≤b≤10.

Input

The input is given from Standard Input in the following format:

a b

Output

If the product is positive, print Positive. If it is negative, print Negative. If it is zero, print Zero.

Sample Input 1

1 3

Sample Output 1

Positive

1×2×3=6 is positive.

Sample Input 2

-3 -1

Sample Output 2

Negative

(-3)×(-2)×(-1)=-6 is negative.

Sample Input 3

-1 1

Sample Output 3

Zero

(-1)×0×1=0.

Solution in Go (1.6) (judge verdict: Wrong Answer)

package main

import (
    "fmt"
    "os"
    "bufio"
    "strings"
    "strconv"
)

func main() {
    var fp *os.File
    fp = os.Stdin
    reader := bufio.NewReaderSize(fp, 4096)
    line1 := readLine(reader)
    arr := strings.Split(line1, " ")
    a, _ := strconv.Atoi(arr[0])
    b, _ := strconv.Atoi(arr[1])

    if a > 0 {
        fmt.Println("Positive")
    } else if b < 0 {
        fmt.Println("Negative")
    } else {
        if a * -1 == b {
            fmt.Println("Zero")
        } else {
            fmt.Println("Negative")
        }
    }
}

func readLine(reader *bufio.Reader) string {
    buf := make([]byte, 0, 1000000)

    for {
        l, p, e := reader.ReadLine()

        if e != nil {
            panic(e)
        }

        buf = append(buf, l...)

        if !p {
            break
        }
    }

    return string(buf)
}