07. Trekking Mania

#include <iostream>
#include <string>

using namespace std;

int main() {
    int numberOfGroups;
    cin >> numberOfGroups;
    int musala = 0, montBlanc = 0, kilimanjaro = 0, k2 = 0, everest = 0;
    int totalClimbersSum = 0;

    for (int i = 0; i < numberOfGroups; i++) {
        int currentGroupPeople;
        cin >> currentGroupPeople;

        totalClimbersSum += currentGroupPeople;

        if (currentGroupPeople > 40) {
            everest += currentGroupPeople;
        }
        else if (currentGroupPeople > 25) {
            k2 += currentGroupPeople;
        }
        else if (currentGroupPeople > 12) {
            kilimanjaro += currentGroupPeople;
        }
        else if (currentGroupPeople > 5) {
            montBlanc += currentGroupPeople;
        }
        else if (currentGroupPeople > 0) {
            musala += currentGroupPeople;
        }
    }

    cout.setf(ios::fixed);
    cout.precision(2);

    cout << (100.0 * musala / totalClimbersSum) << '%' << endl;
    cout << (100.0 * montBlanc / totalClimbersSum) << '%' << endl;
    cout << (100.0 * kilimanjaro / totalClimbersSum) << '%' << endl;
    cout << (100.0 * k2 / totalClimbersSum) << '%' << endl;
    cout << (100.0 * everest / totalClimbersSum) << '%' << endl;

    return 0;
}

Решение с речник, тернарен оператор и foreach:

#include <iostream>
#include <string>
#include <map>

using namespace std;

int main() {
    map < string, int> peakDestination = {
        {"musala", 0},
        {"montBlanc", 0},
        {"kilimanjaro",0},
        {"k2",0},
                {"everest",0},

    };

    int numberOfGroups;
    cin >> numberOfGroups;

    int totalClimbersSum = 0;

    for (int i = 0; i < numberOfGroups; i++) {
        int currentGroupPeople;
        cin >> currentGroupPeople;

        totalClimbersSum += currentGroupPeople;

        string currentDestination =
            currentGroupPeople > 40 ? "everest" :
            currentGroupPeople > 25 ? "k2" :
            currentGroupPeople > 12 ? "kilimanjaro" :
            currentGroupPeople > 5 ? "montBlanc" : "musala";

        peakDestination[currentDestination] += currentGroupPeople;
    }

    cout.setf(ios::fixed);
    cout.precision(2);

    for (string peak : {"musala", "montBlanc", "kilimanjaro", "k2", "everest" }) {
        cout << (100.0 * peakDestination[peak] / totalClimbersSum) << '%' << endl;
    }

    return 0;
}