Submission #52629

#	Time	Username	Problem	Language	Result	Execution time	Memory
52629		Kubalionzzale	Circle selection (APIO18_circle_selection)	C++14	Compilation error	0 ms	0 KiB

circle_selection

#include <iostream>
#include <set>
#include <math.h>
#include <algorithm>
#include <functional>

long double abss(long double x)
{
    if (x < 0)
        return -x;
    else
        return x;
}

long double sqr(long double x)
{
    return x * x;
}

struct compare {
    bool operator() (const std::pair<int, int>& lhs, const std::pair<int, int>& rhs) const {
        if (lhs.first != rhs.first)
            return lhs.first > rhs.first;
        else
            return lhs.second < rhs.second;
    }
};

void firstSubtask(int n)
{
    std::set< std::pair<int, int>, compare > set;
    int visited[300010] = { 0 };
    int x[300010], y[300010], r[300010];
    for (int i = 1; i <= n; ++i)
    {
        std::cin >> x[i] >> y[i] >> r[i];
        set.insert(std::make_pair(r[i], i));
    }

    while (set.empty() == false)
    {
        std::pair<int, int> p = *set.begin();
        set.erase(set.begin());
        int xs = x[p.second], ys = y[p.second], rs = r[p.second];
        visited[p.second] = p.second;

        for (auto it = set.begin(); it != set.end();)
        {
            std::pair<int, int> sec = *it;
            int xq = x[sec.second], yq = y[sec.second], rq = r[sec.second];
            long double dist = sqrt(sqr(xq * 1.0 - xs * 1.0) + sqr(yq * 1.0 - ys * 1.0));

  //          std::cout << p.second << " " << sec.second << " " << dist << " " << rq * 1.0 + rs * 1.0 << "\n";

            if (dist <= rq * 1.0 + rs * 1.0)
            {
                visited[sec.second] = p.second;
                it = set.erase(it);
            }
            else
            {
                ++it;
            }
        }
    }

    for (int i = 1; i <= n; ++i)
    {
        std::cout << visited[i] << " ";
    }
}

int main()
{
    int n;
    std::cin >> n;

    if (n <= 5000)
    {
        firstSubtask(n, x, y, r);
        return 0;
    }
}

Compilation message (stderr)

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:80:25: error: 'x' was not declared in this scope
         firstSubtask(n, x, y, r);
                         ^
circle_selection.cpp:80:28: error: 'y' was not declared in this scope
         firstSubtask(n, x, y, r);
                            ^
circle_selection.cpp:80:31: error: 'r' was not declared in this scope
         firstSubtask(n, x, y, r);
                               ^