Editing 3651 - Ghem (section)

=== Explicație ===
Matricea alăturată se desfășoară “trăgând” de colțul din stânga sus în direcție orizontală obținându-se șirul: <code>1 2 3 4 8 12 16 15 14 13 9 5 6 7 11 10</code>

<syntaxhighlight lang="python" line="1">
def generate_matrix(N):
    matrix = []
    num = 1
    for i in range(N):
        row = []
        for j in range(N):
            row.append(num)
            num += 1
        matrix.append(row)
    return matrix

def spiral_from_top_left(matrix, N):
    result = []
    top, left, bottom, right = 0, 0, N - 1, N - 1
    while top <= bottom and left <= right:
        for i in range(left, right + 1):
            result.append(matrix[top][i])
        top += 1
        for i in range(top, bottom + 1):
            result.append(matrix[i][right])
        right -= 1
        if top <= bottom:
            for i in range(right, left - 1, -1):
                result.append(matrix[bottom][i])
            bottom -= 1
        if left <= right:
            for i in range(bottom, top - 1, -1):
                result.append(matrix[i][left])
            left += 1
    return result

def spiral_from_bottom_right(matrix, N):
    result = []
    bottom, right, top, left = N - 1, N - 1, 0, 0
    while bottom >= top and right >= left:
        for i in range(right, left - 1, -1):
            result.append(matrix[bottom][i])
        bottom -= 1
        for i in range(bottom, top - 1, -1):
            result.append(matrix[i][left])
        left += 1
        if bottom >= top:
            for i in range(left, right + 1):
                result.append(matrix[top][i])
            top += 1
        if right >= left:
            for i in range(top, bottom + 1):
                result.append(matrix[i][right])
            right -= 1
    return result

def spiral_from_top_right(matrix, N):
    result = []
    top, right, bottom, left = 0, N - 1, N - 1, 0
    while top <= bottom and right >= left:
        for i in range(top, bottom + 1):
            result.append(matrix[i][right])
        right -= 1
        for i in range(right, left - 1, -1):
            result.append(matrix[bottom][i])
        bottom -= 1
        if right >= left:
            for i in range(bottom, top - 1, -1):
                result.append(matrix[i][left])
            left += 1
        if top <= bottom:
            for i in range(left, right + 1):
                result.append(matrix[top][i])
            top += 1
    return result

def spiral_from_bottom_left(matrix, N):
    result = []
    bottom, left, top, right = N - 1, 0, 0, N - 1
    while bottom >= top and left <= right:
        for i in range(left, right + 1):
            result.append(matrix[bottom][i])
        bottom -= 1
        for i in range(bottom, top - 1, -1):
            result.append(matrix[i][right])
        right -= 1
        if left <= right:
            for i in range(right, left - 1, -1):
                result.append(matrix[top][i])
            top += 1
        if bottom >= top:
            for i in range(top, bottom + 1):
                result.append(matrix[i][left])
            left += 1
    return result

def get_spiral_order(N, X, Y, D):
    matrix = generate_matrix(N)
    
    if (X, Y) == (1, 1):
        if D == 'O':
            return spiral_from_top_left(matrix, N)
        else:
            return spiral_from_bottom_left(matrix, N)[::-1]
    elif (X, Y) == (1, N):
        if D == 'O':
            return spiral_from_top_right(matrix, N)
        else:
            return spiral_from_top_left(matrix, N)[::-1]
    elif (X, Y) == (N, N):
        if D == 'O':
            return spiral_from_bottom_right(matrix, N)
        else:
            return spiral_from_top_right(matrix, N)[::-1]
    elif (X, Y) == (N, 1):
        if D == 'O':
            return spiral_from_bottom_left(matrix, N)
        else:
            return spiral_from_bottom_right(matrix, N)[::-1]

# Citirea datelor de intrare
N = int(input())
X = int(input())
Y = int(input())
D = input().strip()

# Generarea și afișarea șirului de numere
result = get_spiral_order(N, X, Y, D)
print(" ".join(map(str, result)))
</syntaxhighlight>