2259 : 참외밭

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Scanner;
 
public class Main {
 
    public static int arr[][] = new int [21][3];
    public static int k;
    public static int fullarea = 0;
    public static int cutarea = 0;
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));  
        Scanner scan = new Scanner(System.in);
        
        k = scan.nextInt();
        int i, j;
        int sero=0,garo=0;
        int smallarea = 0;
         
        for (i = 0; i < 6; i++) {
            arr[i][0] = scan.nextInt();
            arr[i][1] = scan.nextInt();
             
            if (arr[i][0] == 1 || arr[i][0] == 2) {
                garo = Math.max(garo, arr[i][1]);
            }
            else {
                sero = Math.max(sero, arr[i][1]);
            }
        }
         
        arr[6][0] = arr[0][0];
        arr[6][1] = arr[0][1];
         
        for (i = 0; i < 6; i++) {
            if (arr[i][0] == 1 && arr[i + 1][0] == 3) {
                smallarea = arr[i][1] * arr[i + 1][1];
            }
            if (arr[i][0] == 2 && arr[i + 1][0] == 4) {
                smallarea = arr[i][1] * arr[i + 1][1];
            }
            if (arr[i][0] == 4 && arr[i + 1][0] == 1) {
                smallarea = arr[i][1] * arr[i + 1][1];
            }
            if (arr[i][0] == 3 && arr[i + 1][0] == 2) {
                smallarea = arr[i][1] * arr[i + 1][1];
            }
        }
         
        System.out.printf("%d", (sero*garo - smallarea) * k);
         
    }
     
     
     
}

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