#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from functools import reduce

CHAR_TO_INT = {"0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9}


def str2int(s):
    ints = map(lambda ch: CHAR_TO_INT[ch], s)
    return reduce(lambda x, y: x * 10 + y, ints)


print(str2int("0"))
print(str2int("12300"))
print(str2int("0012345"))

CHAR_TO_FLOAT = {"0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9, ".": -1}


def str2float(s):
    nums = map(lambda ch: CHAR_TO_FLOAT[ch], s)
    point = 0

    def to_float(f, n):
        nonlocal point
        if n == -1:
            point = 1
            return f
        if point == 0:
            return f * 10 + n
        else:
            point = point * 10
            return f + n / point

    return reduce(to_float, nums, 0.0)


print(str2float("0"))
print(str2float("123.456"))
print(str2float("123.45600"))
print(str2float("0.1234"))
print(str2float(".1234"))
print(str2float("120.0034"))