checksum

def ones_complement(value, bits):
    mask = (1 << bits) - 1
    return (~value) & mask

def binary_sum(frames, bits):
    total = sum(int(frame, 2) for frame in frames)
    while total >> bits:  # Handle carry
        total = (total & ((1 << bits) - 1)) + (total >> bits)
    return total

def sender(frames, bits):
    total = binary_sum(frames, bits)
    checksum = ones_complement(total, bits)
    data_to_send = frames + [f'{checksum:0{bits}b}']
    print("\nSender Side:")
    print("Total Sum (Binary):", f'{total:0{bits}b}')
    print("Checksum (1's complement):", f'{checksum:0{bits}b}')
    print("Data to be sent:", ' '.join(data_to_send))
    return data_to_send

def receiver(received_frames, bits):
    total = binary_sum(received_frames, bits)
    calculated_checksum = ones_complement(total, bits)
    print("\nReceiver Side:")
    print("Received Frames:", ' '.join(received_frames[:-1]))
    print("Received Checksum:", received_frames[-1])
    print("Total Sum (Binary):", f'{total:0{bits}b}')
    print("Calculated Checksum (After Adding Received Checksum):", f'{calculated_checksum:0{bits}b}')
    print("Status:", "Approved (No Error)" if calculated_checksum == 0 else "Discarded (Error)")

# Input
K = int(input("Enter the number of frames to transmit (K): "))
N = int(input("Enter the number of bits in each frame (N): "))
frames = [input(f"Enter frame {i+1} ({N} bits): ") for i in range(K)]

# Sender Side
data_to_send = sender(frames, N)

# Receiver Side
receiver(data_to_send, N)