01. Black Flag

#include <iostream>
#include<iomanip>

using namespace std;

int main() {
    int days, dailyPlunder;
    cin >> days >> dailyPlunder;

    double expectedPlunder, totalPlunder = 0;
    cin >> expectedPlunder;

    for (int i = 1; i <= days; i++) {
        totalPlunder += dailyPlunder;
        if (i % 3 == 0) {
            totalPlunder += dailyPlunder * 0.5;
        }
        if (i % 5 == 0) {
            totalPlunder *= 0.7;
        }
    }

    if (totalPlunder >= expectedPlunder) {
        cout << "Ahoy! " << fixed << setprecision(2) << totalPlunder << " plunder gained.\n";
    }
    else {
        double percentage = totalPlunder / expectedPlunder * 100;
        cout << "Collected only " << fixed << setprecision(2) << percentage << "% of the plunder.\n";
    }
    return 0;
}