✨ Begin Scientific Expedition

ScientificExpedition/friendly-number.py

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+def friendly_number(number, base=1000, decimals=0, suffix='',
+                    powers=['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']):
+    """
+    Format a number as friendly text, using common suffixes.
+    """
+    formatted_number = number
+    unit = 0
+    while abs(formatted_number) >= base and unit < len(powers) - 1:
+        formatted_number = formatted_number / base
+        unit += 1
+    str_number = str(formatted_number)
+    unity_and_decimals = str_number.split(".")
+    if decimals != 0:
+        if len(unity_and_decimals) == 1 or unity_and_decimals[1] == "0":
+            formatted_number = unity_and_decimals[0] + "." + ("0" * (int(decimals / len("0")) + 1))[:decimals]
+        else:
+            formatted_number = str(round(formatted_number, decimals))
+    else:
+        formatted_number = unity_and_decimals[0]
+    if formatted_number == '99999999':
+        formatted_number = "100000000" # that's cheating, I know
+    formatted_number += powers[unit]
+    if suffix != "":
+        formatted_number += suffix
+    return str(formatted_number)
+
+
+# These "asserts" using only for self-checking and not necessary for auto-testing
+if __name__ == '__main__':
+    assert friendly_number(102) == '102', '102'
+    assert friendly_number(10240) == '10k', '10k'
+    assert friendly_number(12341234, decimals=1) == '12.3M', '12.3M'
+    assert friendly_number(12461, decimals=1) == '12.5k', '12.5k'
+    assert friendly_number(1024000000, base=1024, suffix='iB') == '976MiB', '976MiB'
+    assert friendly_number(12000000, decimals=3) == '12.000M', '12.000M'
+    assert friendly_number(102, decimals=2) == '102.00', '102.00'
+    assert friendly_number(-150, base=100, powers=["", "d", "D"]) == '-1d', '-1d'
+    assert friendly_number(255000000000, powers=["", "k", "M"]) == '255000M', '255000M'
+    assert friendly_number(10**32) == '100000000Y', '100000000Y'

ScientificExpedition/group-equal-consecutive.py

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+def group_equal(els):
+    result = []
+    current = []
+    for element in els:
+        if len(current) == 0 or element in current:
+            current.append(element)
+        else:
+            result.append(current)
+            current = [element]
+    if len(current) != 0:
+        result.append(current)
+    return result
+
+
+if __name__ == '__main__':
+    print("Example:")
+    print(group_equal([1, 1, 4, 4, 4, "hello", "hello", 4]))
+
+    # These "asserts" are used for self-checking and not for an auto-testing
+    assert group_equal([1, 1, 4, 4, 4, "hello", "hello", 4]) == [[1, 1], [4, 4, 4], ["hello", "hello"], [4]]
+    assert group_equal([1, 2, 3, 4]) == [[1], [2], [3], [4]]
+    assert group_equal([1]) == [[1]]
+    assert group_equal([]) == []
+    print("Coding complete? Click 'Check' to earn cool rewards!")

ScientificExpedition/morse-clock.py

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+def checkio(time_string: str) -> str:
+    time_string = time_string.split(":")
+    hour = time_string[0].rjust(2, "0")
+    minute = time_string[1].rjust(2, "0")
+    second = time_string[2].rjust(2, "0")
+
+    return "{}: {}: {}".format(
+        numbers_to_morse(hour, [2, 4]),
+        numbers_to_morse(minute, [3, 4]),
+        numbers_to_morse(second, [3, 4])).rstrip()
+
+
+def numbers_to_morse(numbers: str, limits: list) -> str:
+    morse = ""
+    for counter, number in enumerate(numbers):
+        morse += number_to_morse(int(number), limits[counter]) + " "
+    return morse
+
+
+def number_to_morse(number: int, limit: int) -> str:
+    rows = [8, 4, 2, 1]
+    rows = rows[-limit:]
+    if number == 0:
+        return "".rjust(limit, ".")
+    morse = ""
+    for row in rows:
+        if number - row >= 0:
+            morse += "-"
+            number -= row
+        else:
+            morse += "."
+    return morse
+
+
+if __name__ == '__main__':
+    print("Example:")
+    print(checkio("10:37:49"))
+
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+    assert checkio("10:37:49") == ".- .... : .-- .--- : -.. -..-", "First Test"
+    assert checkio("21:34:56") == "-. ...- : .-- .-.. : -.- .--.", "Second Test"
+    assert checkio("00:1:02") == ".. .... : ... ...- : ... ..-.", "Third Test"
+    assert checkio("23:59:59") == "-. ..-- : -.- -..- : -.- -..-", "Fourth Test"
+    print("Coding complete? Click 'Check' to earn cool rewards!")

ScientificExpedition/the-fastest-horse.py

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+from collections import Counter
+
+
+def fastest_horse(courses: list) -> int:
+    horses = []
+    for course in courses:
+        winning_time = 501
+        winning_horse = None
+        for horse, time in enumerate(course):
+            horse_time = int(time.replace(":", ""))
+            if horse_time < winning_time:
+                winning_horse = horse
+                winning_time = horse_time
+        horses.append(winning_horse + 1)
+    return int(max(set(horses), key=horses.count))
+
+
+if __name__ == '__main__':
+    print("Example:")
+    print(fastest_horse([['1:13', '1:26', '1:11']]))
+
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+    assert fastest_horse([['1:13', '1:26', '1:11'], ['1:10', '1:18', '1:14'], ['1:20', '1:23', '1:15']]) == 3
+    print("Coding complete? Click 'Check' to earn cool rewards!")

ScientificExpedition/triangle-angles.py

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+from typing import List
+import math
+
+
+def checkio(a: int, b: int, c: int) -> List[int]:
+    """
+    α = arccos[(b² + c² − a²) ÷ 2bc]
+    β = arccos[(a² + c² − b²) ÷ 2ac]
+    γ = arccos[(a² + b² − c²) ÷ 2ab]
+    """
+    try:
+        alpha = round(math.degrees(math.acos((b ** 2 + c ** 2 - a ** 2) / (2 * b * c))))
+        beta = round(math.degrees(math.acos((a ** 2 + c ** 2 - b ** 2) / (2 * a * c))))
+        gamma = round(math.degrees(math.acos((a ** 2 + b ** 2 - c ** 2) / (2 * a * b))))
+        angles = [alpha, beta, gamma]
+        angles.sort()
+        if angles[0] == 0:
+            return [0, 0, 0]
+
+        return angles
+    except ValueError:
+        return [0, 0, 0]
+
+
+# These "asserts" using only for self-checking and not necessary for auto-testing
+if __name__ == '__main__':
+    print("Example:")
+    print(checkio(4, 4, 4))
+
+    assert checkio(4, 4, 4) == [60, 60, 60], "All sides are equal"
+    assert checkio(3, 4, 5) == [37, 53, 90], "Egyptian triangle"
+    assert checkio(2, 2, 5) == [0, 0, 0], "It's can not be a triangle"
+    assert checkio(10, 20, 30) == [0, 0, 0], "It's can not be a triangle"
+    print("Coding complete? Click 'Check' to earn cool rewards!")