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^{}

def fill_spiral_matrix(N): matrix = [[0] * N for _ in range(N)] # Create an NxN matrix filled with zeros x, y = 0, 0 # Initial coordinates num = N * N # Start from N*N and decrement # Directions: right, down, left, up dx = [0, 1, 0, -1] dy = [1, 0, -1, 0] direction = 0 # Initial direction: right for _ in range(N * N): matrix[x][y] = num # Fill the current cell with the current number num -= 1 nx = x + dx[direction] ny = y + dy[direction] # Change direction if the next cell is out of bounds or already filled if nx < 0 or nx >= N or ny < 0 or ny >= N or matrix[nx][ny] != 0: direction = (direction + 1) % 4 nx = x + dx[direction] ny = y + dy[direction] x, y = nx, ny return matrix # Example usage: N = int(input("Enter an odd number N: ")) matrix = fill_spiral_matrix(N) # Print the matrix for row in matrix: print(' '.join(map(str, row)))