Submission #15324

#	Time	Username	Problem	Language	Result	Execution time	Memory
15324		seirion	맛있는 과자 (kriii3_A)	C++14	33 / 33	6 ms	2496 KiB

A

#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <algorithm>
#include <functional>

using namespace std;
typedef long long int64;

map<double, pair<double, double> > m;
map<double, int64> ccc;

int64 a, b, n, k;
double dev;

void cut() {
    vector<double> temp;
    map<double, int64> tm;
    for (auto x : ccc) {
        double d = x.first;
        int64 count = x.second;
        if (m.find(d) == m.end()) {
            auto x = make_pair(d*a*a/dev/dev, d*b*b/dev/dev);
            tm[x.first] += count;
            tm[x.second] += count;
            m[d] = x;
        }
        else{
            auto x = m[d];
            tm[x.first] += count;
            tm[x.second] += count;
        }
    }
    ccc.swap(tm);
}

int main() {
    cin >> a >> b >> n >> k;
    dev = sqrt(a*a + b*b);
    ccc[(double)a*b/2] = 1;
    while (n--) {
        cut();
    }

    double r;
    int64 acc = 0;
    for (auto x = ccc.rbegin(); x != ccc.rend(); x++) {
        acc += x->second;
        if (acc >= k) {
            printf("%0.10f\n", log(x->first));
            break;
        }
    }

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23