```go
package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	var n int
	fmt.Fscan(in, &n)
	var x, y int64
	fmt.Fscan(in, &x, &y)
	minX, maxX := x, x
	minY, maxY := y, y
	for i := 1; i < n; i++ {
		fmt.Fscan(in, &x, &y)
		if x < minX {
			minX = x
		} else if x > maxX {
			maxX = x
		}
		if y < minY {
			minY = y
		} else if y > maxY {
			maxY = y
		}
	}
	dx := maxX - minX
	dy := maxY - minY
	if dx < dy {
		dx = dy
	}
	fmt.Println(dx * dx)
}
```