heart delivery mid exam - fundamentals

function solve(input) {
    // parse input
    let houses = input.shift().split('@').map(Number);
    let index = 0;

    // for each remaining element, before 'Love!'
    for (let line of input) {
        if (line == 'Love!') {
            break;
        }

        // - parse command
        let offset = Number(line.split(' ')[1]);

        // - move index
        index += offset;

        // - if index outside array -> index = 0
        if (index >= houses.length) {
            index = 0;
        }

        // - if heart count = 0, print message
        if (houses[index] == 0) {
            console.log(`Place ${index} already had Valentine's day.`);
        } else {
            // - else decrease heart count and check if heart count = 0
            houses[index] -= 2;
            if (houses[index] == 0) {
                console.log(`Place ${index} has Valentine's day.`);
            }
        }
    }


    // print result
    console.log(`Cupid's last position was ${index}.`);
    let missed = houses.filter(x => x > 0).length;
    if (missed == 0) {
        console.log('Mission was successful.');
    } else {
        console.log(`Cupid has failed ${missed} places.`);
    }
}

solve(['10@10@10@2', 'Jump 1', 'Jump 2', 'Love!']);
solve(['2@4@2', 'Jump 2', 'Jump 2', 'Jump 8', 'Jump 3', 'Jump 1', 'Love!']);