結果
問題 | No.2517 Right Triangles on Circle |
ユーザー |
|
提出日時 | 2023-10-27 21:34:44 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 178 ms / 2,000 ms |
コード長 | 4,604 bytes |
コンパイル時間 | 2,196 ms |
コンパイル使用メモリ | 192,916 KB |
実行使用メモリ | 18,432 KB |
最終ジャッジ日時 | 2024-09-25 13:39:20 |
合計ジャッジ時間 | 5,148 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 29 |
ソースコード
#line 1 "template/template.hpp"#include <algorithm>#include <bit>#include <bitset>#include <cassert>#include <chrono>#include <climits>#include <cmath>#include <complex>#include <cstddef>#include <cstdint>#include <cstdlib>#include <cstring>#include <functional>#include <iomanip>#include <iostream>#include <limits>#include <map>#include <memory>#include <numbers>#include <numeric>#include <optional>#include <queue>#include <random>#include <ranges>#include <set>#include <stack>#include <string>#include <tuple>#include <type_traits>#include <unordered_map>#include <unordered_set>#include <utility>#include <vector>#define rep(i, a, n) for (int i = (int)(a); i < (int)(n); i++)#define rrep(i, a, n) for (int i = ((int)(n)-1); i >= (int)(a); i--)#define Rep(i, a, n) for (i64 i = (i64)(a); i < (i64)(n); i++)#define RRep(i, a, n) for (i64 i = ((i64)(n)-i64(1)); i >= (i64)(a); i--)#define all(v) (v).begin(), (v).end()#define rall(v) (v).rbegin(), (v).rend()#line 2 "template/debug_template.hpp"#line 4 "template/debug_template.hpp"namespace ebi {#ifdef LOCAL#define debug(...) \std::cerr << "LINE: " << __LINE__ << " [" << #__VA_ARGS__ << "]:", \debug_out(__VA_ARGS__)#else#define debug(...)#endifvoid debug_out() {std::cerr << std::endl;}template <typename Head, typename... Tail> void debug_out(Head h, Tail... t) {std::cerr << " " << h;if (sizeof...(t) > 0) std::cerr << " :";debug_out(t...);}} // namespace ebi#line 2 "template/int_alias.hpp"#line 4 "template/int_alias.hpp"namespace ebi {using std::size_t;using i8 = std::int8_t;using u8 = std::uint8_t;using i16 = std::int16_t;using u16 = std::uint16_t;using i32 = std::int32_t;using u32 = std::uint32_t;using i64 = std::int64_t;using u64 = std::uint64_t;using i128 = __int128_t;using u128 = __uint128_t;} // namespace ebi#line 2 "template/io.hpp"#line 7 "template/io.hpp"namespace ebi {template <typename T1, typename T2>std::ostream &operator<<(std::ostream &os, const std::pair<T1, T2> &pa) {return os << pa.first << " " << pa.second;}template <typename T1, typename T2>std::istream &operator>>(std::istream &os, std::pair<T1, T2> &pa) {return os >> pa.first >> pa.second;}template <typename T>std::ostream &operator<<(std::ostream &os, const std::vector<T> &vec) {for (std::size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");return os;}template <typename T>std::istream &operator>>(std::istream &os, std::vector<T> &vec) {for (T &e : vec) std::cin >> e;return os;}template <typename T>std::ostream &operator<<(std::ostream &os, const std::optional<T> &opt) {if (opt) {os << opt.value();} else {os << "invalid value";}return os;}void fast_io() {std::cout << std::fixed << std::setprecision(15);std::cin.tie(nullptr);std::ios::sync_with_stdio(false);}} // namespace ebi#line 2 "template/utility.hpp"#line 5 "template/utility.hpp"#line 7 "template/utility.hpp"namespace ebi {template <class T> inline bool chmin(T &a, T b) {if (a > b) {a = b;return true;}return false;}template <class T> inline bool chmax(T &a, T b) {if (a < b) {a = b;return true;}return false;}template <class T> T safe_ceil(T a, T b) {if (a % b == 0)return a / b;else if (a >= 0)return (a / b) + 1;elsereturn -((-a) / b);}template <class T> T safe_floor(T a, T b) {if (a % b == 0)return a / b;else if (a >= 0)return a / b;elsereturn -((-a) / b) - 1;}constexpr i64 LNF = std::numeric_limits<i64>::max() / 4;constexpr int INF = std::numeric_limits<int>::max() / 2;const std::vector<int> dy = {1, 0, -1, 0, 1, 1, -1, -1};const std::vector<int> dx = {0, 1, 0, -1, 1, -1, 1, -1};} // namespace ebi#line 2 "a.cpp"namespace ebi {void main_() {int n,m;std::cin >> n >> m;std::vector<int> a(n);std::cin >> a;if(m % 2 != 0) {std::cout << "0\n";return;}std::sort(all(a));std::set<int> set;i64 ans = 0;rep(i,0,n) {if(set.contains(a[i] - m/2)) {ans += n - 2;}set.insert(a[i]);}std::cout << ans << '\n';}} // namespace ebiint main() {ebi::fast_io();int t = 1;// std::cin >> t;while (t--) {ebi::main_();}return 0;}