HeartDelivery

function solve(arr) {
    let neighbourhood = arr.shift().split('@').map(Number);
    let missionSuccessful = false;
    let command = arr.shift();
    let housesCount = neighbourhood.length;
    let currentIndex = 0;
    let housesLeft = neighbourhood.length;

    while(command !== 'Love!') {
        let commandArr = command.split(' ');

        currentIndex += Number(commandArr[1]);
        if(currentIndex >= housesCount) {
            currentIndex = 0;
        }

        if(neighbourhood[currentIndex] <= 0) {
            console.log(`Place ${currentIndex} already had Valentine's day.`);
        } else {
            neighbourhood[currentIndex] -= 2;
            if(neighbourhood[currentIndex] <= 0) {
                console.log(`Place ${currentIndex} has Valentine's day.`);
                housesLeft--;
            }
        }

        command = arr.shift();
    }

    console.log(`Cupid's last position was ${currentIndex}.`);

    if(missionSuccessful) {
        console.log(`Mission was successful.`);
    } else {
        console.log(`Cupid has failed ${housesLeft} places.`);
    }
}