function solve(params) {
    let days = +params.shift();
    let users = +params.shift();
    let priceForSearch = +params.shift();
    let sum = 0;

    for (let i = 0; i < params.length; i++) {
        let word = +params[i];

        if (word <= 5) {
            let wordCount = i + 1;

            let money = priceForSearch;
            if (wordCount % 3 === 0) {
                money *= 3;
            }
            if (word === 1) {
                money *= 2;
            }

            sum += money;
        }
    }

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