9-И-2 ex.3

# -*- coding: utf-8 -*-
"""
Created on Thu Nov 19 20:58:30 2020

@author: Sergey
"""
import math


def left_or_right(x,y,k):
    x1=0
    y1=0
    x2=1
    y2=k*x2
    D = (x - x1) * (y2 - y1) - (y - y1) * (x2 - x1)
    if D > 0:
        ans='right'
    elif D < 0:
        ans='left'
    elif D == 0:
        ans='on'
    return ans

def len_h(x,y,k):
    if (left_or_right(x,y,k) == 'left') or(left_or_right(x,y,k) == 'right'):
        x1=y/k
        y1=k*x
        a=x1-x
        b=y1-y
        c=math.sqrt((a**2)+(b**2))
        ac=(a**2)/c
        bc=c-ac
        h=math.sqrt(ac*bc)
    else:
        h=-1
    return h


x1,y1,x2,y2,x3,y3,k=float(input()),float(input()),float(input()),float(input()),float(input()),float(input()),float(input())

a=[len_h(x1,y1,k),len_h(x2,y2,k),len_h(x3,y3,k)]
print(a)
ans=10**10
if min(a)==-1:
    print(a.index(-1)+1)
else:
    print(a.index(min(a))+1)