Bachelor party

function solve (input) {
    let singerPrice = input[0];
    let totalSum = 0;
    let guestCount = 0;

    for (let index = 1; index < input.length; index++) {
        if (input[index] === 'The restaurant is full') {
            break;
        }

        let groupCount = input[index];
        guestCount += Number(groupCount);

        if (groupCount < 5) {
            totalSum += groupCount * 100;
        } else {
            totalSum += groupCount * 70;
        }
    }

    if (totalSum >= singerPrice) {
        console.log(`You have ${guestCount} guests and ${totalSum - singerPrice} leva left.`);
    } else {
        console.log(`You have ${guestCount} guests and ${totalSum} leva income, but no singer.`);
    }
}