Submission #739543

#	Time	Username	Problem	Language	Result	Execution time	Memory
739543		Kirill22	Nicelines (RMI20_nicelines)	C++17	74.62 / 100	155 ms	976 KiB

nicelines

//#include "lines.h"
#include "bits/stdc++.h"

using namespace std;

long double query(long double x, long double y);
void the_lines_are(std::vector<int> a, std::vector<int> b);

int x = (1 << 15);

map<int, long double> mem;

long double query(int y) {
    if (mem.find(y) != mem.end()) {
        return mem[y];
    }
    return mem[y] = query(x, y);
}

void solve(int subtask_id, int N) {
    if (subtask_id == 4) {
        x = 1024;
    }
    vector<int> res;
    function<void(int, int)> solve = [&] (int l, int r) {
        cout << l << " " << r << endl;
        if (r - l == 1) {
            if (abs(query(l) * 2 - query(l + 1) - query(l - 1)) > 1e-4) {
                res.push_back(l);
            }
            if (abs(query(r) * 2 - query(r + 1) - query(r - 1)) > 1e-4) {
                res.push_back(r);
            }
            return;
        }
        int m = (l + r) / 2;
        if (abs(query(m) * 2 - query(l) - query(r)) < 1e-4) {
            if (abs(query(l) * 2 - query(l + 1) - query(l - 1)) > 1e-4) {
                res.push_back(l);
            }
            if (abs(query(r) * 2 - query(r + 1) - query(r - 1)) > 1e-4) {
                res.push_back(r);
            }
            return;
        }
        solve(l, m);
        solve(m, r);
    };
    if (subtask_id == 4) {
        solve(-x * (1 << 14), x * (1 << 14));
    } else {
        solve(-x * (1 << 14), x * (1 << 14));
    }
    sort(res.begin(), res.end());
    res.resize(unique(res.begin(), res.end()) - res.begin());
    vector<int> a, b;
    for (int i = 0; i < N; i++) {
        int y = res[i] % x;
        if (y < 0) {
            y += x;
        }
        if (y >= x / 2) {
            y -= x;
        }
        b.push_back(y);
        a.push_back((res[i] - y) / x);
    }
    the_lines_are(a, b);
}

• Subtask 1: 11 / 11
• Subtask 2: 13 / 13
• Subtask 3: 7 / 7
• Subtask 4: 13.1509376945 / 19
• Subtask 5: 19.1335173984 / 23
• Subtask 6: 11.339268597 / 27