結果

問題 No.1265 Balloon Survival
コンテスト
ユーザー Mister
提出日時 2020-10-23 22:31:52
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 1,030 bytes
コンパイル時間 2,247 ms
コンパイル使用メモリ 95,244 KB
最終ジャッジ日時 2025-01-15 13:29:43
ジャッジサーバーID
（参考情報） 		judge1 / judge4
このコードへのチャレンジ
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
main.cpp: In function 'void solve()':
main.cpp:31:15: error: 'std::tuple<long long int, int, int> <structured bindings>' has incomplete type
   31 |     for (auto [t, i, j] : events) {
      |               ^~~~~~~~~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/string:47,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/locale_classes.h:40,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/ios_base.h:41,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/ios:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/ostream:38,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/iostream:39,
                 from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/stl_iterator.h: In instantiation of 'constexpr __gnu_cxx::__normal_iterator<_Iterator, _Container>& __gnu_cxx::__normal_iterator<_Iterator, _Container>::operator++() [with _Iterator = std::tuple<long long int, int, int>*; _Container = std::vector<std::tuple<long long int, int, int> >]':
main.cpp:31:27:   required from here
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/stl_iterator.h:1107:11: error: cannot increment a pointer to incomplete type 'std::tuple<long long int, int, int>'
 1107 |         ++_M_current;
      |           ^~~~~~~~~~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/vector:64,
                 from main.cpp:3:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/stl_vector.h: In instantiation of 'constexpr std::_Vector_base<_Tp, _Alloc>::~_Vector_base() [with _Tp = std::tuple<long long int, int, int>; _Alloc = std::allocator<std::tuple<long long int, int, int> >]':
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/stl_vector.h:528:7:   required from here

ソースコード

diff # 

#include <iostream>
#include <algorithm>
#include <vector>

using lint = long long;

void solve() {
    int n;
    std::cin >> n;

    std::vector<std::pair<lint, lint>> ps(n);
    for (auto& [x, y] : ps) std::cin >> x >> y;

    std::vector<std::tuple<lint, int, int>> events;
    for (int i = 0; i < n; ++i) {
        auto [xi, yi] = ps[i];
        for (int j = 0; j < i; ++j) {
            auto [xj, yj] = ps[j];

            auto dx = xi - xj,
                 dy = yi - yj;

            events.emplace_back(dx * dx + dy * dy, j, i);
        }
    }

    std::sort(events.begin(), events.end());

    std::vector<bool> erased(n, false);
    int ans = 0;
    for (auto [t, i, j] : events) {
        if (erased[i] || erased[j]) continue;

        if (i == 0) {
            ++ans;
            erased[j] = true;
        } else {
            erased[i] = erased[j] = true;
        }
    }

    std::cout << ans << "\n";
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}
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