number_of_water = int(input())

TANK_LITER = 255

sum_of_water_overflow = 0

for water_cup in range(0, number_of_water + 1):

    water_cup = int(input())

    if sum_of_water_overflow < TANK_LITER:
        sum_of_water_overflow += water_cup
    if sum_of_water_overflow > TANK_LITER:
        sum_of_water_overflow -= water_cup
print("Insufficient capacity!")
print(f"{sum_of_water_overflow}")