pair_of_numbers = int(input())

total_sum = 0
current_sum = 0
for i in range(1, pair_of_numbers + 1):
    number_one = int(input())
    number_two = int(input())

    current_sum = number_one + number_two
    total_sum += current_sum

if total_sum / pair_of_numbers == current_sum:
    print(f"Yes, value={current_sum}")