Football League

#include <iostream>
#include <string>

using namespace std;

int main() {

    int stadiumCapacity, fanCount, sectorA = 0, sectorB = 0, sectorV = 0, sectorG = 0;
    cin >> stadiumCapacity >> fanCount;

    char currentFanSector;

    for (int i = 0; i < fanCount; i++) {
        cin >> currentFanSector;
        if (currentFanSector == 'A') {
            sectorA++;
        }
        else if (currentFanSector == 'B') {
            sectorB++;
        }
        else if (currentFanSector == 'V') {
            sectorV++;
        }
        else {
            sectorG++;
        }
    }

    printf("%.2f%%\n", 100.0 * sectorA / fanCount);
    printf("%.2f%%\n", 100.0 * sectorB / fanCount);
    printf("%.2f%%\n", 100.0 * sectorV / fanCount);
    printf("%.2f%%\n", 100.0 * sectorG / fanCount);
    printf("%.2f%%\n", 100.0 * fanCount / stadiumCapacity);

    return 0;
}

Решение с колекция и for(each):

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

using namespace std;

int main() {
    map <char, int> sectors = { {'A',0},{'B',0},{'V',0},{'G',0} };

    int stadiumCapacity, fanCount;
    cin >> stadiumCapacity >> fanCount;

    char currentFanSector;

    for (int i = 0; i < fanCount; i++) {
        cin >> currentFanSector;

        sectors[currentFanSector]++;
    }

    for (char sector : {'A', 'B', 'V', 'G'}) {
        printf("%.2f%%\n", 100.0 * sectors[sector] / fanCount);
    }

    printf("%.2f%%\n", 100.0 * fanCount / stadiumCapacity);

    return 0;
}