03. Histogram

function Histogram(input) {
    let count = Number(input[0]);
    let p1 = 0;
    let p2 = 0;
    let p3 = 0;
    let p4 = 0;
    let p5 = 0;

    for (let i = 1; i <= count; i++) {
        let number = Number(input[i]);
        if (number < 200) {
            p1 += 1;
        } else if (number < 400) {
            p2 += 1;
        } else if (number < 600) {
            p3 += 1;
        } else if (number < 800) {
            p4 += 1;
        } else {
            p5 += 1;
        }
    }
    console.log(`${(p1 / count * 100).toFixed(2)}%`);
    console.log(`${(p2 / count * 100).toFixed(2)}%`);
    console.log(`${(p3 / count * 100).toFixed(2)}%`);
    console.log(`${(p4 / count * 100).toFixed(2)}%`);
    console.log(`${(p5 / count * 100).toFixed(2)}%`);
}


Тарикатско решение:)

function Histogram(input) {
    let num = Number(input.shift());
    let histogram = [0, 0, 0, 0, 0];

    for (let i = 0; i < num; i++) {
        let n = Number(input.shift());
        histogram[(n < 200 ? 0 : n < 400 ? 1 : n < 600 ? 2 : n < 800 ? 3 : 4)]++;
    }

    for (let h of histogram) {
        console.log(`${(h / num * 100).toFixed(2)}%`);
    }
}