02. Bike Race

#include <iostream>

using namespace std;

int main() {
    int juniors, seniors;
    cin >> juniors >> seniors;

    string trace;
    cin >> trace;

    double juniorPrice;
    double seniorPrice;

    if (trace == "trail") {
        juniorPrice = 5.5;
        seniorPrice = 7;
    }
    else if (trace == "cross-country") {
        juniorPrice = 8;
        seniorPrice = 9.5;
    }
    else if (trace == "downhill") {
        juniorPrice = 12.25;
        seniorPrice = 13.75;
    }
    else if (trace == "road") {
        juniorPrice = 20;
        seniorPrice = 21.5;
    }

    double totalSum = juniors * juniorPrice + seniors * seniorPrice;

    if (juniors + seniors >= 50 && trace == "cross-country") {
        totalSum *= 0.75;
    }

    totalSum *= 0.95;

    printf("%.2f\n", totalSum);

    return 0;
}

Решение с тернарен оператор:

#include <iostream>

using namespace std;

int main() {
    int juniors, seniors;
    cin >> juniors >> seniors;

    string trace;
    cin >> trace;

    double juniorPrice =
        trace == "trail" ? 5.50 :
        trace == "cross-country" ? 8.00 :
        trace == "downhill" ? 12.25 : 20;

    double seniorPrice =
        trace == "trail" ? 7.00 :
        trace == "cross-country" ? 9.50 :
        trace == "downhill" ? 13.75 : 21.50;

    double totalSum = (juniors * juniorPrice + seniors * seniorPrice)
        * (juniors + seniors >= 50 && trace == "cross-country" ? 0.75 : 1) * 0.95;

    printf("%.2f\n", totalSum);

    return 0;
}