```go
package main

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

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n int
	fmt.Fscan(in, &n)

	var sumX, sumSqX, sumY, sumSqY int64

	for i := 0; i < n; i++ {
		var x, y int64
		fmt.Fscan(in, &x, &y)
		sumX += x
		sumSqX += x * x
		sumY += y
		sumSqY += y * y
	}

	n64 := int64(n)
	// The sum of squared differences for a set of values C is: N * sum(C^2) - sum(C)^2
	ansX := n64*sumSqX - sumX*sumX
	ansY := n64*sumSqY - sumY*sumY

	fmt.Fprintln(out, ansX+ansY)
}
```