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def is_square_form(num: int) -> bool: digit = 9 while num > 0: if num % 10 != digit: return False num //= 100 digit -= 1 return True
project_euler
def solution() -> int: num = 138902663 while not is_square_form(num * num): if num % 10 == 3: num -= 6 # (3 - 6) % 10 = 7 else: num -= 4 # (7 - 4) % 10 = 3 return num * 10
project_euler
def sum_of_digit_factorial(n: int) -> int: return sum(DIGIT_FACTORIAL[d] for d in str(n))
project_euler
def solution() -> int: limit = 7 * factorial(9) + 1 return sum(i for i in range(3, limit) if sum_of_digit_factorial(i) == i)
project_euler
def solution(n: int = 4000000) -> int: if n <= 1: return 0 a = 0 b = 2 count = 0 while 4 * b + a <= n: a, b = b, 4 * b + a count += a return count + b
project_euler
def solution(n: int = 4000000) -> int: even_fibs = [] a, b = 0, 1 while b <= n: if b % 2 == 0: even_fibs.append(b) a, b = b, a + b return sum(even_fibs)
project_euler
def solution(n: int = 4000000) -> int: i = 1 j = 2 total = 0 while j <= n: if j % 2 == 0: total += j i, j = j, i + j return total
project_euler
def solution(n: int = 4000000) -> int: fib = [0, 1] i = 0 while fib[i] <= n: fib.append(fib[i] + fib[i + 1]) if fib[i + 2] > n: break i += 1 total = 0 for j in range(len(fib) - 1): if fib[j] % 2 == 0: total += fib[j] return total
project_euler
def solution(n: int = 4000000) -> int: try: n = int(n) except (TypeError, ValueError): raise TypeError("Parameter n must be int or castable to int.") if n <= 0: raise ValueError("Parameter n must be greater than or equal to one.") getcontext().prec = 100 phi = (Decimal(5) **...
project_euler
def greatest_common_divisor(x: int, y: int) -> int: return x if y == 0 else greatest_common_divisor(y, x % y)
project_euler
def lcm(x: int, y: int) -> int: return (x * y) // greatest_common_divisor(x, y)
project_euler
def solution(n: int = 20) -> int: g = 1 for i in range(1, n + 1): g = lcm(g, i) return g
project_euler
def solution(n: int = 20) -> int: try: n = int(n) except (TypeError, ValueError): raise TypeError("Parameter n must be int or castable to int.") if n <= 0: raise ValueError("Parameter n must be greater than or equal to one.") i = 0 while 1: i += n * (n - 1) n...
project_euler
def solution(min_block_length: int = 50) -> int: fill_count_functions = [1] * min_block_length for n in count(min_block_length): fill_count_functions.append(1) for block_length in range(min_block_length, n + 1): for block_start in range(n - block_length): fill_coun...
project_euler
def check_bouncy(n: int) -> bool: if not isinstance(n, int): raise ValueError("check_bouncy() accepts only integer arguments") str_n = str(n) sorted_str_n = "".join(sorted(str_n)) return sorted_str_n != str_n and sorted_str_n[::-1] != str_n
project_euler
def solution(percent: float = 99) -> int: if not 0 < percent < 100: raise ValueError("solution() only accepts values from 0 to 100") bouncy_num = 0 num = 1 while True: if check_bouncy(num): bouncy_num += 1 if (bouncy_num / num) * 100 >= percent: return nu...
project_euler
def sieve() -> Generator[int, None, None]: factor_map: dict[int, int] = {} prime = 2 while True: factor = factor_map.pop(prime, None) if factor: x = factor + prime while x in factor_map: x += factor factor_map[x] = factor else: ...
project_euler
def solution(limit: float = 1e10) -> int: primes = sieve() n = 1 while True: prime = next(primes) if (2 * prime * n) > limit: return n # Ignore the next prime as the reminder will be 2. next(primes) n += 2
project_euler
def is_palindrome(n: int) -> bool: if n % 10 == 0: return False s = str(n) return s == s[::-1]
project_euler
def solution() -> int: answer = set() first_square = 1 sum_squares = 5 while sum_squares < LIMIT: last_square = first_square + 1 while sum_squares < LIMIT: if is_palindrome(sum_squares): answer.add(sum_squares) last_square += 1 sum_squa...
project_euler
def choose(n: int, r: int) -> int: ret = 1.0 for i in range(1, r + 1): ret *= (n + 1 - i) / i return round(ret)
project_euler
def non_bouncy_exact(n: int) -> int: return choose(8 + n, n) + choose(9 + n, n) - 10
project_euler
def non_bouncy_upto(n: int) -> int: return sum(non_bouncy_exact(i) for i in range(1, n + 1))
project_euler
def solution(num_digits: int = 100) -> int: return non_bouncy_upto(num_digits)
project_euler
def solution(length: int = 50) -> int: ways_number = [1] * (length + 1) for row_length in range(3, length + 1): for block_length in range(3, row_length + 1): for block_start in range(row_length - block_length): ways_number[row_length] += ways_number[ row...
project_euler
def solution(limit: int = 100) -> int: singles: list[int] = [*list(range(1, 21)), 25] doubles: list[int] = [2 * x for x in range(1, 21)] + [50] triples: list[int] = [3 * x for x in range(1, 21)] all_values: list[int] = singles + doubles + triples + [0] num_checkouts: int = 0 double: int thr...
project_euler
def __init__(self, vertices: set[int], edges: Mapping[EdgeT, int]) -> None: self.vertices: set[int] = vertices self.edges: dict[EdgeT, int] = { (min(edge), max(edge)): weight for edge, weight in edges.items() }
project_euler
def add_edge(self, edge: EdgeT, weight: int) -> None: self.vertices.add(edge[0]) self.vertices.add(edge[1]) self.edges[(min(edge), max(edge))] = weight
project_euler
def prims_algorithm(self) -> Graph: subgraph: Graph = Graph({min(self.vertices)}, {}) min_edge: EdgeT min_weight: int edge: EdgeT weight: int while len(subgraph.vertices) < len(self.vertices): min_weight = max(self.edges.values()) + 1 for edge, we...
project_euler
def solution(filename: str = "p107_network.txt") -> int: script_dir: str = os.path.abspath(os.path.dirname(__file__)) network_file: str = os.path.join(script_dir, filename) edges: dict[EdgeT, int] = {} data: list[str] edge1: int edge2: int with open(network_file) as f: data = f.read...
project_euler
def solution(min_total: int = 10**12) -> int: prev_numerator = 1 prev_denominator = 0 numerator = 1 denominator = 1 while numerator <= 2 * min_total - 1: prev_numerator += 2 * numerator numerator += 2 * prev_numerator prev_denominator += 2 * denominator denominato...
project_euler
def _calculate(days: int, absent: int, late: int) -> int: # if we are absent twice, or late 3 consecutive days, # no further prize strings are possible if late == 3 or absent == 2: return 0 # if we have no days left, and have not failed any other rules, # we have a prize string if days...
project_euler
def solution(days: int = 30) -> int: return _calculate(days, absent=0, late=0)
project_euler
def solve(matrix: Matrix, vector: Matrix) -> Matrix: size: int = len(matrix) augmented: Matrix = [[0 for _ in range(size + 1)] for _ in range(size)] row: int row2: int col: int col2: int pivot_row: int ratio: float for row in range(size): for col in range(size): ...
project_euler
def interpolated_func(var: int) -> int: return sum( round(coeffs[x_val][0]) * (var ** (size - x_val - 1)) for x_val in range(size) )
project_euler
def question_function(variable: int) -> int: return ( 1 - variable + variable**2 - variable**3 + variable**4 - variable**5 + variable**6 - variable**7 + variable**8 - variable**9 + variable**10 )
project_euler
def solution(func: Callable[[int], int] = question_function, order: int = 10) -> int: data_points: list[int] = [func(x_val) for x_val in range(1, order + 1)] polynomials: list[Callable[[int], int]] = [ interpolate(data_points[:max_coeff]) for max_coeff in range(1, order + 1) ] ret: int = 0 ...
project_euler
def is_prime(number: int) -> bool: if 1 < number < 4: # 2 and 3 are primes return True elif number < 2 or number % 2 == 0 or number % 3 == 0: # Negatives, 0, 1, all even numbers, all multiples of 3 are not primes return False # All primes number are in format of 6k +/- 1 ...
project_euler
def solution(a_limit: int = 1000, b_limit: int = 1000) -> int: longest = [0, 0, 0] # length, a, b for a in range((a_limit * -1) + 1, a_limit): for b in range(2, b_limit): if is_prime(b): count = 0 n = 0 while is_prime((n**2) + (a * n) + b): ...
project_euler
def solution(): script_dir = os.path.dirname(os.path.realpath(__file__)) triangle = os.path.join(script_dir, "triangle.txt") with open(triangle) as f: triangle = f.readlines() a = [[int(y) for y in x.rstrip("\r\n").split(" ")] for x in triangle] for i in range(1, len(a)): for j in...
project_euler
def solution(num: int = 100) -> int: return sum(map(int, str(factorial(num))))
project_euler
def solution(num: int = 100) -> int: return sum(int(x) for x in str(factorial(num)))
project_euler
def factorial(num: int) -> int: sum_of_digits = 0 while number > 0: last_digit = number % 10 sum_of_digits += last_digit number = number // 10 # Removing the last_digit from the given number return sum_of_digits
project_euler
def solution(num: int = 100) -> int: nfact = factorial(num) result = split_and_add(nfact) return result
project_euler
def solution(num: int = 100) -> int: fact = 1 result = 0 for i in range(1, num + 1): fact *= i for j in str(fact): result += int(j) return result
project_euler
def solution(power: int = 1000) -> int: n = 2**power r = 0 while n: r, n = r + n % 10, n // 10 return r
project_euler
def solution(power: int = 1000) -> int: num = 2**power string_num = str(num) list_num = list(string_num) sum_of_num = 0 for i in list_num: sum_of_num += int(i) return sum_of_num
project_euler
def solution(n: int = 100) -> int: collect_powers = set() current_pow = 0 n = n + 1 # maximum limit for a in range(2, n): for b in range(2, n): current_pow = a**b # calculates the current power collect_powers.add(current_pow) # adds the result to the set return ...
project_euler
def solution(): with open(os.path.dirname(__file__) + "/grid.txt") as f: l = [] # noqa: E741 for _ in range(20): l.append([int(x) for x in f.readline().split()]) maximum = 0 # right for i in range(20): for j in range(17): temp = l[i]...
project_euler
def largest_product(grid): n_columns = len(grid[0]) n_rows = len(grid) largest = 0 lr_diag_product = 0 rl_diag_product = 0 # Check vertically, horizontally, diagonally at the same time (only works # for nxn grid) for i in range(n_columns): for j in range(n_rows - 3): ...
project_euler
def solution(): grid = [] with open(os.path.dirname(__file__) + "/grid.txt") as file: for line in file: grid.append(line.strip("\n").split(" ")) grid = [[int(i) for i in grid[j]] for j in range(len(grid))] return largest_product(grid)
project_euler
def hexagonal_num(n: int) -> int: return n * (2 * n - 1)
project_euler
def is_pentagonal(n: int) -> bool: root = (1 + 24 * n) ** 0.5 return ((1 + root) / 6) % 1 == 0
project_euler
def solution(start: int = 144) -> int: n = start num = hexagonal_num(n) while not is_pentagonal(num): n += 1 num = hexagonal_num(n) return num
project_euler
def parse_roman_numerals(numerals: str) -> int: total_value = 0 index = 0 while index < len(numerals) - 1: current_value = SYMBOLS[numerals[index]] next_value = SYMBOLS[numerals[index + 1]] if current_value < next_value: total_value -= current_value else: ...
project_euler
def generate_roman_numerals(num: int) -> str: numerals = "" m_count = num // 1000 numerals += m_count * "M" num %= 1000 c_count = num // 100 if c_count == 9: numerals += "CM" c_count -= 9 elif c_count == 4: numerals += "CD" c_count -= 4 if c_count >= 5:...
project_euler
def solution(roman_numerals_filename: str = "/p089_roman.txt") -> int: savings = 0 with open(os.path.dirname(__file__) + roman_numerals_filename) as file1: lines = file1.readlines() for line in lines: original = line.strip() num = parse_roman_numerals(original) shortened =...
project_euler
def solution(): script_dir = os.path.dirname(os.path.realpath(__file__)) words_file_path = os.path.join(script_dir, "words.txt") words = "" with open(words_file_path) as f: words = f.readline() words = [word.strip('"') for word in words.strip("\r\n").split(",")] words = [ word ...
project_euler
def solution() -> int: answer = 0 decimal_context = decimal.Context(prec=105) for i in range(2, 100): number = decimal.Decimal(i) sqrt_number = number.sqrt(decimal_context) if len(str(sqrt_number)) > 1: answer += int(str(sqrt_number)[0]) sqrt_number_str = str(...
project_euler
def digit_factorial_sum(number: int) -> int: if not isinstance(number, int): raise TypeError("Parameter number must be int") if number < 0: raise ValueError("Parameter number must be greater than or equal to 0") # Converts number in string to iterate on its digits and adds its factorial. ...
project_euler
def solution(chain_length: int = 60, number_limit: int = 1000000) -> int: if not isinstance(chain_length, int) or not isinstance(number_limit, int): raise TypeError("Parameters chain_length and number_limit must be int") if chain_length <= 0 or number_limit <= 0: raise ValueError( ...
project_euler
def sum_digit_factorials(n: int) -> int: if n in CACHE_SUM_DIGIT_FACTORIALS: return CACHE_SUM_DIGIT_FACTORIALS[n] ret = sum(DIGIT_FACTORIALS[let] for let in str(n)) CACHE_SUM_DIGIT_FACTORIALS[n] = ret return ret
project_euler
def chain_length(n: int, previous: set | None = None) -> int: previous = previous or set() if n in CHAIN_LENGTH_CACHE: return CHAIN_LENGTH_CACHE[n] next_number = sum_digit_factorials(n) if next_number in previous: CHAIN_LENGTH_CACHE[n] = 0 return 0 else: previous.add(...
project_euler
def solution(num_terms: int = 60, max_start: int = 1000000) -> int: return sum(1 for i in range(1, max_start) if chain_length(i) == num_terms)
project_euler
def solution(max_d: int = 12_000) -> int: fractions_number = 0 for d in range(max_d + 1): for n in range(d // 3 + 1, (d + 1) // 2): if gcd(n, d) == 1: fractions_number += 1 return fractions_number
project_euler
def solution(limit: int = 50000000) -> int: ret = set() prime_square_limit = int((limit - 24) ** (1 / 2)) primes = set(range(3, prime_square_limit + 1, 2)) primes.add(2) for p in range(3, prime_square_limit + 1, 2): if p not in primes: continue primes.difference_update(s...
project_euler
def solution(n: int = 2000000) -> int: primality_list = [0 for i in range(n + 1)] primality_list[0] = 1 primality_list[1] = 1 for i in range(2, int(n**0.5) + 1): if primality_list[i] == 0: for j in range(i * i, n + 1, i): primality_list[j] = 1 sum_of_primes = 0 ...
project_euler
def is_prime(number: int) -> bool: if 1 < number < 4: # 2 and 3 are primes return True elif number < 2 or number % 2 == 0 or number % 3 == 0: # Negatives, 0, 1, all even numbers, all multiples of 3 are not primes return False # All primes number are in format of 6k +/- 1 ...
project_euler
def prime_generator() -> Iterator[int]: num = 2 while True: if is_prime(num): yield num num += 1
project_euler
def solution(n: int = 2000000) -> int: return sum(takewhile(lambda x: x < n, prime_generator()))
project_euler
def is_prime(number: int) -> bool: if 1 < number < 4: # 2 and 3 are primes return True elif number < 2 or number % 2 == 0 or number % 3 == 0: # Negatives, 0, 1, all even numbers, all multiples of 3 are not primes return False # All primes number are in format of 6k +/- 1 ...
project_euler
def solution(n: int = 2000000) -> int: return sum(num for num in range(3, n, 2) if is_prime(num)) + 2 if n > 2 else 0
project_euler
def solution(n: int = 1000) -> int: # number of letters in zero, one, two, ..., nineteen (0 for zero since it's # never said aloud) ones_counts = [0, 3, 3, 5, 4, 4, 3, 5, 5, 4, 3, 6, 6, 8, 8, 7, 7, 9, 8, 8] # number of letters in twenty, thirty, ..., ninety (0 for numbers less than # 20 due to incon...
project_euler
def solution(n: int = 1001) -> int: total = 1 for i in range(1, int(ceil(n / 2.0))): odd = 2 * i + 1 even = 2 * i total = total + 4 * odd**2 - 6 * even return total
project_euler
def sum_of_divisors(n: int) -> int: total = 0 for i in range(1, int(sqrt(n) + 1)): if n % i == 0 and i != sqrt(n): total += i + n // i elif i == sqrt(n): total += i return total - n
project_euler
def solution(n: int = 10000) -> int: total = sum( i for i in range(1, n) if sum_of_divisors(sum_of_divisors(i)) == i and sum_of_divisors(i) != i ) return total
project_euler
def solution(numerator: int = 1, digit: int = 1000) -> int: the_digit = 1 longest_list_length = 0 for divide_by_number in range(numerator, digit + 1): has_been_divided: list[int] = [] now_divide = numerator for _ in range(1, digit + 1): if now_divide in has_been_divided:...
project_euler
def solution(): days_per_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] day = 6 month = 1 year = 1901 sundays = 0 while year < 2001: day += 7 if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0): if day > days_per_month[month - 1] and month != 2: ...
project_euler
def solution(limit: int = 1000000) -> int: num_cuboids: int = 0 max_cuboid_size: int = 0 sum_shortest_sides: int while num_cuboids <= limit: max_cuboid_size += 1 for sum_shortest_sides in range(2, 2 * max_cuboid_size + 1): if sqrt(sum_shortest_sides**2 + max_cuboid_size**2)....
project_euler
def solution(limit: int = 1000000) -> int: primes = set(range(3, limit, 2)) primes.add(2) for p in range(3, limit, 2): if p not in primes: continue primes.difference_update(set(range(p * p, limit, p))) phi = [float(n) for n in range(limit + 1)] for p in primes: ...
project_euler
def solution(limit: int = 1_000_000) -> int: phi = [i - 1 for i in range(limit + 1)] for i in range(2, limit + 1): if phi[i] == i - 1: for j in range(2 * i, limit + 1, i): phi[j] -= phi[j] // i return sum(phi[2 : limit + 1])
project_euler
def solution(limit: int = 1500000) -> int: frequencies: DefaultDict = defaultdict(int) euclid_m = 2 while 2 * euclid_m * (euclid_m + 1) <= limit: for euclid_n in range((euclid_m % 2) + 1, euclid_m, 2): if gcd(euclid_m, euclid_n) > 1: continue primitive_perimet...
project_euler
def solution(filename: str = "matrix.txt") -> int: with open(os.path.join(os.path.dirname(__file__), filename)) as in_file: data = in_file.read() grid = [[int(cell) for cell in row.split(",")] for row in data.strip().splitlines()] dp = [[0 for cell in row] for row in grid] n = len(grid[0]) ...
project_euler
def is_substring_divisible(num: tuple) -> bool: if num[3] % 2 != 0: return False if (num[2] + num[3] + num[4]) % 3 != 0: return False if num[5] % 5 != 0: return False tests = [7, 11, 13, 17] for i, test in enumerate(tests): if (num[i + 4] * 100 + num[i + 5] * 10 + ...
project_euler
def solution(n: int = 10) -> int: return sum( int("".join(map(str, num))) for num in permutations(range(n)) if is_substring_divisible(num) )
project_euler
def is_pentagonal(n: int) -> bool: root = (1 + 24 * n) ** 0.5 return ((1 + root) / 6) % 1 == 0
project_euler
def solution(limit: int = 5000) -> int: pentagonal_nums = [(i * (3 * i - 1)) // 2 for i in range(1, limit)] for i, pentagonal_i in enumerate(pentagonal_nums): for j in range(i, len(pentagonal_nums)): pentagonal_j = pentagonal_nums[j] a = pentagonal_i + pentagonal_j b ...
project_euler
def maxpooling(arr: np.ndarray, size: int, stride: int) -> np.ndarray: arr = np.array(arr) if arr.shape[0] != arr.shape[1]: raise ValueError("The input array is not a square matrix") i = 0 j = 0 mat_i = 0 mat_j = 0 # compute the shape of the output matrix maxpool_shape = (arr.sh...
computer_vision
def avgpooling(arr: np.ndarray, size: int, stride: int) -> np.ndarray: arr = np.array(arr) if arr.shape[0] != arr.shape[1]: raise ValueError("The input array is not a square matrix") i = 0 j = 0 mat_i = 0 mat_j = 0 # compute the shape of the output matrix avgpool_shape = (arr.sh...
computer_vision
def __init__(self, k: float, window_size: int): if k in (0.04, 0.06): self.k = k self.window_size = window_size else: raise ValueError("invalid k value")
computer_vision
def __str__(self) -> str: return str(self.k)
computer_vision
def detect(self, img_path: str) -> tuple[cv2.Mat, list[list[int]]]: img = cv2.imread(img_path, 0) h, w = img.shape corner_list: list[list[int]] = [] color_img = img.copy() color_img = cv2.cvtColor(color_img, cv2.COLOR_GRAY2RGB) dy, dx = np.gradient(img) ixx = dx*...
computer_vision
def mean_threshold(image: Image) -> Image: height, width = image.size mean = 0 pixels = image.load() for i in range(width): for j in range(height): pixel = pixels[j, i] mean += pixel mean //= width * height for j in range(width): for i in range(height): ...
computer_vision
def main() -> None: img_paths, annos = get_dataset(LABEL_DIR, IMAGE_DIR) print("Processing...") new_images, new_annos, paths = update_image_and_anno(img_paths, annos, FLIP_TYPE) for index, image in enumerate(new_images): # Get random string code: '7b7ad245cdff75241935e4dd860f3bad' lette...
computer_vision
def get_dataset(label_dir: str, img_dir: str) -> tuple[list, list]: img_paths = [] labels = [] for label_file in glob.glob(os.path.join(label_dir, "*.txt")): label_name = label_file.split(os.sep)[-1].rsplit(".", 1)[0] with open(label_file) as in_file: obj_lists = in_file.readline...
computer_vision
def update_image_and_anno( img_list: list, anno_list: list, flip_type: int = 1 ) -> tuple[list, list, list]: new_annos_lists = [] path_list = [] new_imgs_list = [] for idx in range(len(img_list)): new_annos = [] path = img_list[idx] path_list.append(path) img_annos = ...
computer_vision
def random_chars(number_char: int = 32) -> str: assert number_char > 1, "The number of character should greater than 1" letter_code = ascii_lowercase + digits return "".join(random.choice(letter_code) for _ in range(number_char))
computer_vision
def warp( image: np.ndarray, horizontal_flow: np.ndarray, vertical_flow: np.ndarray ) -> np.ndarray: flow = np.stack((horizontal_flow, vertical_flow), 2) # Create a grid of all pixel coordinates and subtract the flow to get the # target pixels coordinates grid = np.stack( np.meshgrid(np.ara...
computer_vision
def horn_schunck( image0: np.ndarray, image1: np.ndarray, num_iter: SupportsIndex, alpha: float | None = None, ) -> tuple[np.ndarray, np.ndarray]: if alpha is None: alpha = 0.1 # Initialize flow horizontal_flow = np.zeros_like(image0) vertical_flow = np.zeros_like(image0) #...
computer_vision
def price_plus_tax(price: float, tax_rate: float) -> float: return price * (1 + tax_rate)
financial