結果
問題 | No.743 Segments on a Polygon |
ユーザー |
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提出日時 | 2020-02-08 19:33:32 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 39 ms / 2,000 ms |
コード長 | 5,292 bytes |
コンパイル時間 | 1,801 ms |
コンパイル使用メモリ | 175,092 KB |
実行使用メモリ | 7,168 KB |
最終ジャッジ日時 | 2024-09-25 11:29:14 |
合計ジャッジ時間 | 2,979 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 10 |
ソースコード
// >>> TEMPLATES#include <bits/stdc++.h>using namespace std;using ll = long long;using ld = long double;#define int ll#define double ld#define rep(i,n) for (int i = 0; i < (int)(n); i++)#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)#define loop(i,a,B) for (int i = a; i B; i++)#define loopR(i,a,B) for (int i = a; i B; i--)#define all(x) (x).begin(), (x).end()#define allR(x) (x).rbegin(), (x).rend()#define pb push_back#define eb emplace_back#define mp make_pair#define fst first#define snd second#define INF (numeric_limits<int>::max()/2-1)#ifdef LOCAL#include "debug.hpp"#define dump(...) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl#define debug if (1)#else#define dump(...) (void)(0)#define say(x) (void)(0)#define debug if (0)#endiftemplate <class T> using pque_max = priority_queue<T>;template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;template <class F> struct FixPoint : private F {constexpr FixPoint(F&& f) : F(forward<F>(f)) {}template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }};struct MakeFixPoint {template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }};#define MFP MakeFixPoint()|#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)template <class T, size_t d> struct vec_impl {using type = vector<typename vec_impl<T,d-1>::type>;template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }};template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }template <class T> void quit(T const& x) { cout << x << endl; exit(0); }template <class T> constexpr bool chmin(T& x, T const& y) { if (x > y) { x = y; return true; } return false; }template <class T> constexpr bool chmax(T& x, T const& y) { if (x < y) { x = y; return true; } return false; }template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }template <class T> int sz(T const& x) { return x.size(); }template <class C, class T> int lbd(C const& v, T const& x) {return lower_bound(v.begin(), v.end(), x)-v.begin();}template <class C, class T> int ubd(C const& v, T const& x) {return upper_bound(v.begin(), v.end(), x)-v.begin();}// <<<// >>> BITstruct BIT {int n;vector<int> v; // use v[1..n]BIT(int n) : n(n), v(n+1) {}int get(int i) const { return sum(i+1)-sum(i); }void set(int i, int x) { add(i,x-get(i)); }void add(int i, int x) {assert(0 <= i && i < n);for (i++; i <= n; i += i&(-i)) v[i] += x;}int sum(int r) const { // [0,r)assert(0 <= r && r <= n);int s = 0;for (int i = r; i > 0; i -= i&(-i)) s += v[i];return s;}int sum(int l, int r) const { // [l,r)return sum(r)-sum(l);}};// <<<// >>> reordvoid reord_impl(vector<int> const&) { }template <class T, class... Args>void reord_impl(vector<int> const& idx, vector<T> &v, Args&&... args) {vector<T> t(v.size());rep (i,v.size()) t[i] = v[idx[i]];swap(v,t);reord_impl(idx, forward<Args>(args)...);}template <class Comp, class T, class... Args,class = decltype(declval<Comp>()(0,0))>void reord(Comp comp, vector<T> &v, Args&&... args) {vector<int> idx(v.size());iota(idx.begin(), idx.end(), 0);sort(idx.begin(), idx.end(), comp);reord_impl(idx, v, args...);}template <class T, class... Args>void reord(vector<T> &v, Args&&... args) {vector<int> idx(v.size());iota(idx.begin(), idx.end(), 0);sort(idx.begin(), idx.end(), [&](int i, int j) { return v[i] < v[j]; });reord_impl(idx, v, args...);}// <<<int32_t main() {int n,m; cin >> n >> m;vector<int> a(n),b(n);rep (i,n) cin >> a[i] >> b[i];rep (i,n) if (a[i] > b[i]) swap(a[i],b[i]);reord(a,b);int cnt = 0;BIT bit(m);rep (i,n) {cnt += bit.sum(a[i],b[i]+1);bit.add(b[i],1);}cout << cnt << endl;}