W5A2 : Robot And The Charger

'''
@Author: Zanjo
@Date Of Creation: 27/08/18
'''

import math


def calculate_movements(x):
    movements = {'UP': 0, 'DOWN': 0, 'RIGHT': 0, 'LEFT': 0}
    for i in range(x):
        n = input().split()
        movements[n[0]] += int(n[1])
    return movements


x = int(input())
movements = calculate_movements(x)
resultant_y = movements['UP'] - movements['DOWN']
resultant_x = movements['LEFT'] - movements['RIGHT']
print(round(math.sqrt((resultant_x**2)+(resultant_y**2))), end="")