High Jump

function highJumps(input) {
    let index = 0;
    let jumpTarget = Number(input[index++]);
    let startJump = jumpTarget - 30;
    let counter = 0;
    let fall = 0;

    while (fall !== 3 && startJump <= jumpTarget) {
        let jump = Number(input[index++]);

        if (jump > startJump) {
            startJump += 5;
            fall = 0;
        } else {
            fall++;
        }
        counter++;
    }

    if (startJump <= jumpTarget) {
        console.log(`Tihomir failed at ${startJump}cm after ${counter} jumps.`);
    } else {
        console.log(`Tihomir succeeded, he jumped over ${jumpTarget}cm after ${counter} jumps.`);
    }
}

РЕШЕНИЕ СЪС SHIFT():

function highJumps(input) {
    let jumpTarget = Number(input.shift());
    let startJump = jumpTarget - 30;
    let counter = 0;
    let fall = 0;

    while (fall !== 3 && startJump <= jumpTarget) {
        let jump = Number(input.shift());

        if (jump > startJump) {
            startJump += 5;
            fall = 0;
        } else {
            fall++;
        }
        counter++;
    }

    if (startJump <= jumpTarget) {
        console.log(`Tihomir failed at ${startJump}cm after ${counter} jumps.`);
    } else {
        console.log(`Tihomir succeeded, he jumped over ${jumpTarget}cm after ${counter} jumps.`);
    }
}