import sys
from itertools import islice
import numpy as np


def resolve(in_):
    N = int(next(in_))
    # K = np.fromiter(map(int, islice(in_, N)), np.float64)
    b = in_.read()
    K = np.fromstring(b, dtype=np.float128, sep='\n')
    np.savetxt(sys.stdout, np.add.accumulate(np.sqrt(K, dtype=np.float128), dtype=np.float128), fmt='%.18g', delimiter='\n')


def main():
    resolve(sys.stdin.buffer)


if __name__ == '__main__':
    main()