#include <stdio.h>

int main() {
    int a=0,b=0,c=0,d=0,i,e=0,n=0,m=0,o=0;
    int x[6],y[6];
    scanf("%d",&e);
    for(i=0;i<6;i++)
    {
        scanf("%d %d",&x[i],&y[i]);
        if(a<y[i])
        {
            a=y[i];
            b=i;
        }
    }
    if(0<=b-1)
    {
        c=b-1;
    }
    else c=5;
    if(5>=b+1)
    {
        d=b+1;
    }
    else
    {
        d=0;
    }
    if(y[d]>y[c])
    {
        n=c-1;
        if(5<n)
        {
            n=n-6;
        }
        m=c-2;
        if(5<m)
        {
            m=m-6;
        }
        o=(a*y[c]-y[n]*y[m])*e;
    }
    else
    {
        n=d-1;
        if(n<0)
        {
            n=n+6;
        }
        m=d-2;
        if(0>m)
        {
            m=m+6;
        }
        o=(a*y[d]-y[n]*y[m])*e;
    }
    printf("%d",n);
}