#include <stdio.h>

int main() {
    int a=0,b=0,c=0,d=0,e=0,i=0,l=0,o=0,g=0,h=0,z=0,A=0;
    int x[1000],y[1000],p[1000],q[1000];
    scanf("%d",&b);
    for(int i=0;i<6;i++)
    {
        scanf("%d %d",&x[i],&y[i]);
        p[i]=x[i];
        q[i]=y[i];
    }
    for(i=0;i<5;i++)
    {
        for(int j=i+1;j<6;j++)
            {
                if(y[i]<y[j])
                {
                a=y[i];
                c=x[i];
                y[i]=y[j];
                x[i]=x[j];
                y[j]=a;
                x[j]=c;
                }
            }
    }
    if(x[0]==2){
    for(i=1;i<6;i++)
        {
        if(x[i]==4 || x[i]==3)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==4 || x[i]==3)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==4 || x[i]==3)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==4 || x[i]==3)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==4 || x[i]==3)
        {
            d=y[0]*y[i];
            break;
        }
        }
        }
       else if(x[0]==1){
    for(i=1;i<6;i++)
        {
        if(x[i]==3 || x[i]==4)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==3 || x[i]==4)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==3 || x[i]==4)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==3 || x[i]==4)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==3 || x[i]==4)
        {
            d=y[0]*y[i];
            break;
        }
        }
        }
        if(x[0]==4){
    for(i=1;i<6;i++)
        {
        if(x[i]==2 || x[i]==1)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==2 || x[i]==1)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==2 || x[i]==1)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==2 || x[i]==1)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==2 || x[i]==1)
        {
            d=y[0]*y[i];
            break;
        }
        }
        }
        if(x[0]==3){
    for(i=1;i<6;i++)
        {
        if(x[i]==1 || x[i]==2)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==1 || x[i]==2)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==1 || x[i]==2)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==1 || x[i]==2)
        {
            d=y[0]*y[i];
            break;
        }
        else if(x[i]==3 || x[i]==2)
        {
            d=y[0]*y[i];
            break;
        }
        }
        }
        for(o=1;i<6;o++)
        {
            if(x[0]==p[o] && y[0]==q[o])
            {
                break;
            }
        }
    if(o==3)
    {
        z=q[5]*q[0];
    }
    else if(o==4)
    {
        z=q[0]*q[1];
    }
    else if(o==5)
    {
        z=q[1]*q[2];
    }
    else{
    z=q[o+2]*q[o+3];
    }
    A=d-z;
    A=A*b;
    printf("%d",A);
}

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