n = int(input())
from sys import maxsize

sum1 = 0
sum2 = 0
value = 0
diff = -maxsize

for i in range(n * 2):
    number = int(input())
    value += number
    if i % 2 == 0:
        sum2 = sum1
        sum1 = 0
        sum1 += number
    else:
        sum1 += number
        if diff < abs(sum1 - sum2) and i != 1:
            diff = abs(sum1 - sum2)

if diff == 0 or diff == -maxsize:
    print(f"Yes, value={int(value / n)}")
else:
    print(f"No, maxdiff={diff}")