結果
問題 | No.2823 PEX (Predecessing Excluded Value) Game |
ユーザー |
![]() |
提出日時 | 2024-07-26 23:42:19 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 104 ms / 2,000 ms |
コード長 | 3,602 bytes |
コンパイル時間 | 2,135 ms |
コンパイル使用メモリ | 196,876 KB |
最終ジャッジ日時 | 2025-02-23 18:57:16 |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 51 |
ソースコード
//#define NDEBUG#pragma warning(disable : 4146)#include <bits/stdc++.h>namespace n91 {using i32 = std::int32_t;using i64 = std::int64_t;using u32 = std::uint32_t;using u64 = std::uint64_t;using isize = std::ptrdiff_t;using usize = std::size_t;using f64 = double;#ifdef _MSC_VERusing i128 = i64;using u128 = u64;#elseusing i128 = __int128_t;using u128 = __uint128_t;#endifstruct rep {struct itr {usize i;constexpr itr(const usize i) noexcept : i(i) {}void operator++() noexcept { ++i; }constexpr usize operator*() const noexcept { return i; }constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }};const itr f, l;constexpr rep(const usize f, const usize l) noexcept: f(std::min(f, l)), l(l) {}constexpr auto begin() const noexcept { return f; }constexpr auto end() const noexcept { return l; }};struct revrep {struct itr {usize i;constexpr itr(const usize i) noexcept : i(i) {}void operator++() noexcept { --i; }constexpr usize operator*() const noexcept { return i; }constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }};const itr f, l;constexpr revrep(const usize f, const usize l) noexcept: f(l - 1), l(std::min(f, l) - 1) {}constexpr auto begin() const noexcept { return f; }constexpr auto end() const noexcept { return l; }};template <class T> auto md_vec(const usize n, const T& value) {return std::vector<T>(n, value);}template <class... Args> auto md_vec(const usize n, Args... args) {return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));}template <class T> constexpr T difference(const T& a, const T& b) noexcept {return a < b ? b - a : a - b;}template <class T> void chmin(T& a, const T& b) noexcept {if (b < a)a = b;}template <class T> void chmax(T& a, const T& b) noexcept {if (a < b)a = b;}template <class F> class rec_lambda {F f;public:rec_lambda(F&& f_) : f(std::forward<F>(f_)) {}template <class... Args> auto operator()(Args &&... args) const {return f(*this, std::forward<Args>(args)...);}};template <class T> T scan() {T ret;std::cin >> ret;return ret;}constexpr char eoln = '\n';i64 floor_div(const i64 n, const i64 d) {assert(d != 0);return n / d - static_cast<i64>((n ^ d) < 0 && n % d != 0);}i64 ceil_div(const i64 n, const i64 d) {assert(d != 0);return n / d + static_cast<i64>((n ^ d) >= 0 && n % d != 0);}#ifdef N91_LOCAL#define OJ_LOCAL(a, b) b#else#define OJ_LOCAL(a, b) a#endif} // namespace n91#include <atcoder/modint>using mint = atcoder::modint998244353;namespace n91 {void main_() {const usize n = scan<usize>();std::vector<i64> l(n), r(n);for (const usize i : rep(0, n)) {std::cin >> l[i] >> r[i];}u64 gr = 0;i64 prev = -1;for (const usize i : rep(0, n + 1)) {i64 L = (i ? r[i - 1] : 0) + 1;i64 R = i != n ? l[i] - 1 : r[n - 1] + 1;if (L > R)continue;if (prev != -1) {gr ^= L - prev - 1;prev = -1;L++;}if ((R - L + 1) % 2 == 1) {prev = R;}}std::cout << (gr ? "First" : "Second") << eoln;}} // namespace n91int main() {//*std::ios::sync_with_stdio(false);std::cin.tie(nullptr);//*/std::cout << std::fixed << std::setprecision(20);n91::main_();return 0;}