function solve(input) {
    let amount = Number(input.shift())
    let coins = 0

    while (amount > 0) {
        if (amount >= 2) {
            amount = amount - 2
            coins++

        }
        if (amount >= 1 && amount < 2) {
            amount = amount - 1
            coins++
        }
        if (amount >= 0.5 && amount < 1) {
            amount = amount - 0.5
            coins++
        }
        if (amount >= 0.2 && amount < 0.5) {
            amount = amount - 0.2
            coins++
        }
        if (amount >= 0.1 && amount < 0.2) {
            amount = amount - 0.1
            coins++
        }
        if (amount >= 0.05 && amount < 0.1) {
            amount = amount - 0.05
            coins++
        }
        if (amount >= 0.02 && amount < 0.05) {
            amount = amount - 0.02
            coins++
        }
        if (amount >= 0.01 && amount < 0.02) {
            amount = amount - 0.01
            coins++
        }
    }
    console.log(coins)

}