function solve(input) {


  let countDoubles = Number(input[0]);

  let sum = 0;
  let sum2 = 0;
  let sum3 = 0;

  let result1 = 0;
  let result2 = 0;
  let result3 = 0;
  let maxdiff = 0;



  for (var i = 1; !isNaN(input[i]); i = i + 2) {

    let currentNumber = Number(input[i]);
    let nextNumber = Number(input[i + 1]);


    sum = currentNumber + nextNumber;


    if (result1 === sum || i === 1) {

      result1 = sum;


      sum2 = sum;



    } else {

      if (countDoubles === 2) {

        sum3 = sum;

        if (sum2 > sum3) {

          maxdiff = sum2 - sum3;

          break;

        } else if (sum3 > sum2) {

          maxdiff = sum3 - sum2;

          break;

        }

      }


      if (result2 === 0) {

        result2 = sum;



      } else {



        if (isNaN(input[i + 2])) {

          result3 = sum - result3;

        } else {

          result3 = sum;

        }


      }


      if (result2 > result3) {

        maxdiff = result2;



      } else if (result2 < result3) {

        maxdiff = result3;



      }

    }



  }




  if (maxdiff === 0) {

    console.log(`Yes, value=${result1}`);

  } else {

    console.log(`No, maxdiff=${maxdiff}`);

  }

  // console.log(result1, result2);

}