05. Coins

#include <iostream>
#include <string>

using namespace std;

int main() {
    double input;
    cin >> input;

    int change = input * 100;
    int coinCount = 0;

    while (change > 0) {    // ИЛИ:  for (int i = 0; change > 0; i++) {
        if (change >= 200) {
            change -= 200;
        }
        else if (change >= 100) {
            change -= 100;
        }
        else if (change >= 50) {
            change -= 50;
        }
        else if (change >= 20) {
            change -= 20;
        }
        else if (change >= 10) {
            change -= 10;
        }
        else if (change >= 5) {
            change -= 5;
        }
        else if (change >= 2) {
            change -= 2;
        }
        else {
            change--;
        }

        coinCount++;
    }

    cout << coinCount << endl;

    return 0;
}

РЕШЕНИЕ С ТЕРНАРЕН ОПЕРАТОР:

#include <iostream>
#include <string>

using namespace std;

int main() {
    double input;
    cin >> input;

    int change = input * 100;
    int coinCount = 0;

 while (change != 0) {

    change -=
        change >= 200 ? 200 :
        change >= 100 ? 100 :
        change >= 50 ? 50 :
        change >= 20 ? 20 :
        change >= 10 ? 10 :
        change >= 5 ? 5 :
        change >= 2 ? 2 : 1;

    coinCount++;
}

    cout << coinCount << endl;

    return 0;
}

РЕШЕНИЕ БЕЗ ЦИКЪЛ:

#include <iostream>
#include <string>

using namespace std;

int main() {
    double input;
    cin >> input;

    int change = input * 100;
    int coinCount = 0;

    if (change >= 200) {
        coinCount += change / 200;
        change %= 200;
    }
    if (change >= 100) {
        coinCount += change / 100;
        change %= 100;
    }
    if (change >= 50) {
        coinCount += change / 50;
        change %= 50;
    }
    if (change >= 20) {
        coinCount += change / 20;
        change %= 20;
    }
    if (change >= 10) {
        coinCount += change / 10;
        change %= 10;
    }
    if (change >= 5) {
        coinCount += change / 5;
        change %= 5;
    }
    if (change >= 2) {
        coinCount += change / 2;
        change %= 2;
    }
    if (change == 1) {
        coinCount++;
        change--;
    }

    cout << coinCount << endl;

    return 0;
}

РЕШЕНИЕ С МАСИВ И FOR:

#include <iostream>
#include <string>

using namespace std;

int main() {
    double input;
    cin >> input;

    int change = input * 100;
    int coinCount = 0;

    int coinValues[] = { 200, 100, 50, 20, 10, 5, 2, 1 };

    for (int i = 0; i < sizeof(coinValues) / sizeof(int); i++) {
        if (change >= coinValues[i]) {
            coinCount += change / coinValues[i];
            change %= coinValues[i];
        }
    }

    cout << coinCount << endl;

    return 0;
}

РЕШЕНИЕ С FOR-EACH:  // TARIKAT EDITION:)

#include <iostream>
#include <string>

using namespace std;

int main() {
    double input;
    cin >> input;

    int change = input * 100;
    int coinCount = 0;

    for (auto coinValue : { 200, 100, 50, 20, 10, 5, 2, 1 }) {
        if (change >= coinValue) {
            coinCount += change / coinValue;
            change %= coinValue;
        }
    }

    cout << coinCount << endl;

    return 0;
}