Equal pairs

function solve(input) {
    let n = Number(input.shift());
    let sum = 0;
    let sums = [];

    for(let i = 1; i <= n ; i++) {
        let firstNum = Number(input.shift());
        let secondNum = Number(input.shift());
        sum = firstNum + secondNum;
        sums.push(sum);
    }
    // console.log(sums);
    sum = 0;
    for(let k = 0; k < n; k++) {
        sum += sums[k];
    }

    if(sum / n == sums[0]) {
        console.log(`Yes, value=${sums[0]}`);
    } else {
        let max = Math.max(...sums);
        let min = Math.min(...sums);
        let maxdiff = max - min;
        console.log(`No, maxdiff=${maxdiff}`);
    }

}

solve([7, 34, -33, 52, 12, -32, 32, 23, 41, 7, 25, 34, 23, 124, 21]);