Untitled

from math import inf
number_goups  = int(input())
sum_current_pair = 0
sum_previous_pair = 0
max_sum = -inf
min_sum = inf
difference = 0

for group in range(number_goups):
    number_one = int(input())
    number_two = int(input())
    sum_current_pair = number_one + number_two
    if group == 0:
        sum_previous_pair = sum_current_pair
    else:
        difference = sum_current_pair - sum_previous_pair
        sum_previous_pair = sum_current_pair

# diff = max_sum - min_sum
if difference != 0:
    print(f"No, maxdiff={abs(difference)}")
else:
    print(f"Yes, value={sum_current_pair} ")