구름LEVEL_파도 센서(별1개)_답

import math

X, Y, R = map(int, input().split())

input_x_y = [list(map(int, input().split())) for _ in range(5)]

for i in range(5):
    distance = math.sqrt((X - input_x_y[i][0]) ** 2 + (Y - input_x_y[i][1]) ** 2)

    if i == 0:
        min_distance = distance
        sensor = i + 1

    else:
        if distance < min_distance:
            min_distance = distance
            sensor = i + 1
        else:
            continue

if min_distance <= R:
    print(sensor)
else:
    print(-1)