//8.    Еднакви двойки
public class MyClass {
    public static void main(String args[]) {
       java.util.Scanner scanner = new java.util.Scanner(System.in);
       int numberOfPairs = scanner.nextInt();
       int maxDiff = 0;
       int firstNumber = 0;
       int secondNumber = 0;

       int firstPairSum = 0;
       int secondPairSum = 0;

       int trueMaxDiff = 0;

       for (int i = 1; i <= numberOfPairs;i++) {
           firstNumber = scanner.nextInt();
           secondNumber = scanner.nextInt();
           if (i == 1) {
               firstPairSum = firstNumber + secondNumber;
               secondPairSum = 0;
           } else {
               secondPairSum = firstNumber + secondNumber;
               maxDiff = firstPairSum - secondPairSum;
               if (Math.abs(maxDiff) > trueMaxDiff) {
                   trueMaxDiff = Math.abs(maxDiff);
               }
               firstPairSum = secondPairSum;
           }
       }
       if (trueMaxDiff == 0) {
           System.out.printf("Yes, value=%d", firstPairSum);
       } else {
           System.out.printf("No, maxdiff=%d", trueMaxDiff);
       }
    }
}