#include <iostream>
#include <tgmath.h>

using namespace std;

int main()
{
    float PERCENT;
    cout << "Whats the chance that you get a X% drop from 100 / X tries? (1% in 100, 0,5% in 200)" << endl << "Input the percentage chance for an item: ";
    cin >> PERCENT;
    int RATE = ceil(100.0 / PERCENT);
    int foundAmount, searchedAmount;
    foundAmount = searchedAmount = 0;
    srand(time(NULL));
    for(int k = 0; k < 1000000; k++) { //I have put an insane number here so it's very accurate.
        for(int i = 0; i < RATE; i++) {
            int number = rand()%100;

            if (number < PERCENT) {
                foundAmount++;
                break;
            }
        }

        searchedAmount++;
    }

    cout << (foundAmount/(float)searchedAmount) * 100 << "%" << endl;
}