R1AH.cpp

#include <cstdio>
#include <cmath>
#include <cstring>
#include <ctime>
#include <iostream>
#include <algorithm>
#include <set>
#include <vector>
#include <sstream>
#include <typeinfo>
#include <fstream>

using namespace std;

class EllysTicketPrices {
    double eps = 1e-9;
    public:
    double getPrice(int N, vector<int> C, int target) {
        double hi = 1e8;
        double low = 0;
        for (int loop = 0; loop < 10000; ++loop) {
            double m = (hi+low)/2.0;
            m = (long long)(m * 100 + 0.5 + eps) * 0.01;
            double mm(m);
            double sum = m;

            for(int i=0;i<C.size();i++){
                double p = m * (100 + C[i]);
                p = (long long)(p + 0.5 + eps) * 0.01;
                sum += p;
                m = p;
            }
            double ave = (long long)(sum / N * 100 + 0.5 + eps) * 0.01;

            if(ave + eps > target){
                hi = mm;
            }else{
                low = mm;
            }
        }
        return hi;
    }
};

// CUT begin
ifstream data("EllysTicketPrices.sample");

string next_line() {
    string s;
    getline(data, s);
    return s;
}

template <typename T> void from_stream(T &t) {
    stringstream ss(next_line());
    ss >> t;
}

void from_stream(string &s) {
    s = next_line();
}

template <typename T> void from_stream(vector<T> &ts) {
    int len;
    from_stream(len);
    ts.clear();
    for (int i = 0; i < len; ++i) {
        T t;
        from_stream(t);
        ts.push_back(t);
    }
}

template <typename T>
string to_string(T t) {
    stringstream s;
    s << t;
    return s.str();
}

string to_string(string t) {
    return "\"" + t + "\"";
}

bool double_equal(const double &a, const double &b) { return b==b && a==a && fabs(b - a) <= 1e-9 * max(1.0, fabs(a) ); }

bool do_test(int N, vector<int> C, int target, double __expected) {
    time_t startClock = clock();
    EllysTicketPrices *instance = new EllysTicketPrices();
    double __result = instance->getPrice(N, C, target);
    double elapsed = (double)(clock() - startClock) / CLOCKS_PER_SEC;
    delete instance;

    if (double_equal(__expected, __result)) {
        cout << "PASSED!" << " (" << elapsed << " seconds)" << endl;
        return true;
    }
    else {
        cout << "FAILED!" << " (" << elapsed << " seconds)" << endl;
        cout << "           Expected: " << to_string(__expected) << endl;
        cout << "           Received: " << to_string(__result) << endl;
        return false;
    }
}

int run_test(bool mainProcess, const set<int> &case_set, const string command) {
    int cases = 0, passed = 0;
    while (true) {
        if (next_line().find("--") != 0)
            break;
        int N;
        from_stream(N);
        vector<int> C;
        from_stream(C);
        int target;
        from_stream(target);
        next_line();
        double __answer;
        from_stream(__answer);

        cases++;
        if (case_set.size() > 0 && case_set.find(cases - 1) == case_set.end())
            continue;

        cout << "  Testcase #" << cases - 1 << " ... ";
        if ( do_test(N, C, target, __answer)) {
            passed++;
        }
    }
    if (mainProcess) {
        cout << endl << "Passed : " << passed << "/" << cases << " cases" << endl;
        int T = time(NULL) - 1555785769;
        double PT = T / 60.0, TT = 75.0;
        cout << "Time   : " << T / 60 << " minutes " << T % 60 << " secs" << endl;
        cout << "Score  : " << 1000 * (0.3 + (0.7 * TT * TT) / (10.0 * PT * PT + TT * TT)) << " points" << endl;
    }
    return 0;
}

int main(int argc, char *argv[]) {
    cout.setf(ios::fixed, ios::floatfield);
    cout.precision(2);
    set<int> cases;
    bool mainProcess = true;
    for (int i = 1; i < argc; ++i) {
        if ( string(argv[i]) == "-") {
            mainProcess = false;
        } else {
            cases.insert(atoi(argv[i]));
        }
    }
    if (mainProcess) {
        cout << "EllysTicketPrices (1000 Points)" << endl << endl;
    }
    return run_test(mainProcess, cases, argv[0]);
}
// CUT end