import sys
from decimal import Decimal, getcontext, ROUND_HALF_UP

getcontext().prec = 35  # Sufficient precision to handle up to 1e6 terms

n = int(sys.stdin.readline())
current_sum = Decimal(0)
for _ in range(n):
    x_str = sys.stdin.readline().strip()
    x = Decimal(x_str)
    sqrt_x = x.sqrt()
    current_sum += sqrt_x
    # Round to 17 decimal places using quantize
    rounded = current_sum.quantize(Decimal('1.00000000000000000'), rounding=ROUND_HALF_UP)
    # Convert to string and ensure exactly 17 decimal digits
    s = format(rounded, 'f')
    if '.' in s:
        integer_part, fractional_part = s.split('.')
        fractional_part = fractional_part.ljust(17, '0')[:17]
        formatted = f"{integer_part}.{fractional_part}"
    else:
        formatted = f"{s}.{'0'*17}"
    print(formatted)