function solve(input = []) {
    let houses = input.shift().split('@').map(Number);
    let commands = input.shift();

    let currentIndex = 0;

    while (commands !== 'Love!') {
        let tokens = commands.split(' ');
        let command = tokens[0];
        let jumpLength = +tokens[1];

        currentIndex += jumpLength;

        if (currentIndex >= houses.length) {
            currentIndex = 0;
        }

        if (houses[currentIndex] !== 0) {
            houses[currentIndex] -= 2;

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

        commands = input.shift();
    }

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

    let isSuccess = true;

    for (const house of houses) {
        if (house !== 0) {
            isSuccess = false;
            break;
        }
    }

    let count = 0;

    for (const house of houses) {
        if (house !== 0) {
            count++;
        }
    }

    if (isSuccess) {
        console.log(`Mission successful.`);
    } else {
        console.log(`Cupid has failed ${count} places.`);
    }
}

solve(['10@10@10@2', 'Jump 1', 'Jump 2', 'Love!'])