12. Equal Pairs

#include <iostream>
using namespace std;

int main()
{
    int number;
    cin >> number;

    int sum = 0;
    int previous = 0;
    int difference = 0;
    int max_difference = 0;

    for (int i = 0; i < number; ++i)
    {
        int number1, number2;
        cin >> number1 >> number2;
        sum = number1 + number2;
        difference = abs(number1 + number2 - previous);
        previous = sum;
        if (difference > max_difference && sum != difference)
        {
            max_difference = difference;
        }
    }

    if (difference != 0 && sum != difference)
    {
        cout << "No, maxdiff=" << max_difference << endl;
    }
    else
    {
        cout << "Yes, value=" << sum << endl;
    }
    return 0;
}