#!/usr/bin/env python3

import turtle

dx = [0, 1, 0, -1]
dy = [1, 0, -1, 0]


def main():
    try:
        n = int(input())
        lengths = [int(l) for l in input().split()]
        if n != len(lengths):
            raise ValueError('n != len(lengths)')
    except:
        print('Zły format wejścia. Podaj wejście w formacie takim jaki jest opisany w treści zadania.')
        return
    
    points = [(0, 0)]
    x = 0
    y = 0

    min_xy, max_xy = 0, 0

    for i, l in enumerate(lengths):
        x += dx[i % 4] * l
        y += dy[i % 4] * l
        points.append((x, y))
        min_xy = min([min_xy, x, y])
        max_xy = max([max_xy, x, y])

    grid_size = 400 / (max_xy - min_xy)

    turtle.speed(0)
    turtle.left(90)
    for l in lengths:
        turtle.forward(grid_size * l)
        turtle.right(90)
    turtle.left(90)

    turtle.mainloop()


if __name__ == '__main__':
    main()
