function solve(arr) {
    let days = Number(arr.shift());
    let users = Number(arr.shift());
    let money = Number(arr.shift());
    let totalMoney = 0;
    let counter = 1;

    for (let i = 0; i < arr.length; i++ , counter++) {
        let currWord = Number(arr[i]);
        let currentMoney = money;

        if (currWord > 5) {
            continue;
        }
        if (currWord === 1) {
            currentMoney *= 2;
        }
        if (counter % 3 === 0) {
            currentMoney *= 3;
        }

        totalMoney += currentMoney;
    }
    console.log(`Total money earned for ${days} days: ${(totalMoney * days).toFixed(2)}`);
}