結果

問題 No.1265 Balloon Survival
ユーザー hitonanodehitonanode
提出日時 2020-10-23 22:35:10
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 68 ms / 2,000 ms
コード長 4,255 bytes
コンパイル時間 2,930 ms
コンパイル使用メモリ 213,632 KB
実行使用メモリ 13,316 KB
最終ジャッジ日時 2024-07-21 11:24:45
合計ジャッジ時間 4,759 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 2 ms
6,816 KB
testcase_02 AC 2 ms
6,816 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 2 ms
6,940 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,940 KB
testcase_07 AC 2 ms
6,944 KB
testcase_08 AC 2 ms
6,944 KB
testcase_09 AC 2 ms
6,944 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,940 KB
testcase_12 AC 2 ms
6,940 KB
testcase_13 AC 2 ms
6,940 KB
testcase_14 AC 9 ms
6,944 KB
testcase_15 AC 7 ms
6,944 KB
testcase_16 AC 4 ms
6,944 KB
testcase_17 AC 38 ms
13,096 KB
testcase_18 AC 5 ms
6,940 KB
testcase_19 AC 4 ms
6,944 KB
testcase_20 AC 10 ms
6,940 KB
testcase_21 AC 18 ms
6,944 KB
testcase_22 AC 12 ms
6,940 KB
testcase_23 AC 13 ms
6,940 KB
testcase_24 AC 66 ms
11,660 KB
testcase_25 AC 67 ms
11,720 KB
testcase_26 AC 68 ms
12,440 KB
testcase_27 AC 67 ms
12,224 KB
testcase_28 AC 68 ms
13,316 KB
testcase_29 AC 66 ms
12,204 KB
testcase_30 AC 67 ms
11,864 KB
testcase_31 AC 66 ms
12,024 KB
testcase_32 AC 66 ms
12,480 KB
testcase_33 AC 65 ms
12,280 KB
testcase_34 AC 2 ms
6,940 KB
testcase_35 AC 2 ms
6,940 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pint = pair<int, int>;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_;
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
template <typename T, typename V>
void ndarray(vector<T>& vec, const V& val, int len) { vec.assign(len, val); }
template <typename T, typename V, typename... Args> void ndarray(vector<T>& vec, const V& val, int len, Args... args) { vec.resize(len), for_each(begin(vec), end(vec), [&](T& v) { ndarray(v, val, args...); }); }
template <typename T> bool chmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; }
template <typename T> bool chmin(T &m, const T q) { if (m > q) {m = q; return true;} else return false; }
template <typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); }
template <typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); }
template <typename T> vector<T> srtunq(vector<T> vec) { sort(vec.begin(), vec.end()), vec.erase(unique(vec.begin(), vec.end()), vec.end()); return vec; }
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) { os << '['; for (auto v : vec) os << v << ','; os << ']'; return os; }
#if __cplusplus >= 201703L
template <typename... T> istream &operator>>(istream &is, tuple<T...> &tpl) { std::apply([&is](auto &&... args) { ((is >> args), ...);}, tpl); return is; }
template <typename... T> ostream &operator<<(ostream &os, const tuple<T...> &tpl) { std::apply([&os](auto &&... args) { ((os << args << ','), ...);}, tpl); return os; }
#endif
template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T, typename TH> ostream &operator<<(ostream &os, const unordered_set<T, TH> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
template <typename TK, typename TV, typename TH> ostream &operator<<(ostream &os, const unordered_map<TK, TV, TH> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
#ifdef HITONANODE_LOCAL
#define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl
#else
#define dbg(x) {}
#endif


int main()
{
    int N;
    cin >> N;
    vector<lint> X(N), Y(N);
    REP(i, N) cin >> X[i] >> Y[i];
    vector<pair<lint, pint>> V;
    REP(i, N) REP(j, i) V.emplace_back((Y[i] - Y[j]) * (Y[i] - Y[j]) + (X[i] - X[j]) * (X[i] - X[j]), minmax(i, j));
    sort(V.begin(), V.end());
    vector<int> alive(N, 1);
    int ret = 0;
    for (auto [d, p] : V) {
        auto [i, j] = p;
        if (!alive[i] or !alive[j]) continue;
        if (i == 0) {
            alive[j] = 0;
            ret++;
        }
        else {
            alive[i] = alive[j] = 0;
        }
    }
    cout << ret << '\n';
}
0