# Problem Solving (Basic) Skill Verification Test

#!/bin/python3

import math

import os

import random

import re

import sys

#

# Complete the 'getBattery' function below.

#

# The function is expected to return an INTEGER.

# The function accepts INTEGER_ARRAY events as parameter.

#

def getBattery(events):

battery_level = 50

while events != []:

battery_level = perform_event(events.pop(0), battery_level)

return battery_level

def perform_event(event, battery_level):

potential_battery = battery_level + event

if potential_battery >= 100:

return 100

elif potential_battery <= 0:

return 0

else:

return potential_battery

if __name__ == '__main__':

fptr = open(os.environ['OUTPUT_PATH'], 'w')

events_count = int(input().strip())

events = []

for _ in range(events_count):

events_item = int(input().strip())

events.append(events_item)

result = getBattery(events)

fptr.write(str(result) + '\n')

fptr.close()