結果
問題 | No.2873 Kendall's Tau |
ユーザー |
![]() |
提出日時 | 2024-09-06 22:40:50 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 18,548 bytes |
コンパイル時間 | 5,905 ms |
コンパイル使用メモリ | 342,724 KB |
実行使用メモリ | 27,724 KB |
最終ジャッジ日時 | 2024-09-06 22:41:25 |
合計ジャッジ時間 | 15,538 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 13 WA * 17 |
ソースコード
#line 1 "library/my_template.hpp"#if defined(LOCAL)#include <my_template_compiled.hpp>#else// https://codeforces.com/blog/entry/96344#pragma GCC optimize("Ofast,unroll-loops")// いまの CF だとこれ入れると動かない?// #pragma GCC target("avx2,popcnt")#include <bits/stdc++.h>using namespace std;using ll = long long;using u32 = unsigned int;using u64 = unsigned long long;using i128 = __int128;using u128 = unsigned __int128;using f128 = __float128;template <class T> constexpr T infty = 0;template <> constexpr int infty<int> = 1'000'000'000;template <> constexpr ll infty<ll> = ll(infty<int>) * infty<int> * 2;template <> constexpr u32 infty<u32> = infty<int>;template <> constexpr u64 infty<u64> = infty<ll>;template <> constexpr i128 infty<i128> = i128(infty<ll>) * infty<ll>;template <> constexpr double infty<double> = infty<ll>;template <> constexpr long double infty<long double> = infty<ll>;using pi = pair<ll, ll>;using vi = vector<ll>;template <class T> using vc = vector<T>;template <class T> using vvc = vector<vc<T>>;template <class T> using vvvc = vector<vvc<T>>;template <class T> using vvvvc = vector<vvvc<T>>;template <class T> using vvvvvc = vector<vvvvc<T>>;template <class T> using pq = priority_queue<T>;template <class T> using pqg = priority_queue<T, vector<T>, greater<T>>;#define vv(type, name, h, ...) \vector<vector<type>> name(h, vector<type>(__VA_ARGS__))#define vvv(type, name, h, w, ...) \vector<vector<vector<type>>> name( \h, vector<vector<type>>(w, vector<type>(__VA_ARGS__)))#define vvvv(type, name, a, b, c, ...) \vector<vector<vector<vector<type>>>> name( \a, vector<vector<vector<type>>>( \b, vector<vector<type>>(c, vector<type>(__VA_ARGS__))))// https://trap.jp/post/1224/#define FOR1(a) for(ll _ = 0; _ < ll(a); ++_)#define FOR2(i, a) for(ll i = 0; i < ll(a); ++i)#define FOR3(i, a, b) for(ll i = a; i < ll(b); ++i)#define FOR4(i, a, b, c) for(ll i = a; i < ll(b); i += (c))#define FOR1_R(a) for(ll i = (a) - 1; i >= ll(0); --i)#define FOR2_R(i, a) for(ll i = (a) - 1; i >= ll(0); --i)#define FOR3_R(i, a, b) for(ll i = (b) - 1; i >= ll(a); --i)#define overload4(a, b, c, d, e, ...) e#define overload3(a, b, c, d, ...) d#define FOR(...) overload4(__VA_ARGS__, FOR4, FOR3, FOR2, FOR1)(__VA_ARGS__)#define FOR_R(...) overload3(__VA_ARGS__, FOR3_R, FOR2_R, FOR1_R)(__VA_ARGS__)#define FOR_subset(t, s) \for(ll t = (s); t >= 0; t = (t == 0 ? -1 : (t - 1) & (s)))#define all(x) x.begin(), x.end()#define len(x) ll(x.size())#define elif else if#define eb emplace_back#define mp make_pair#define mt make_tuple#define fi first#define se second#define stoi stollint popcnt(int x) { return __builtin_popcount(x); }int popcnt(u32 x) { return __builtin_popcount(x); }int popcnt(ll x) { return __builtin_popcountll(x); }int popcnt(u64 x) { return __builtin_popcountll(x); }int popcnt_mod_2(int x) { return __builtin_parity(x); }int popcnt_mod_2(u32 x) { return __builtin_parity(x); }int popcnt_mod_2(ll x) { return __builtin_parityll(x); }int popcnt_mod_2(u64 x) { return __builtin_parityll(x); }// (0, 1, 2, 3, 4) -> (-1, 0, 1, 1, 2)int topbit(int x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }int topbit(u32 x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }int topbit(ll x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }int topbit(u64 x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }// (0, 1, 2, 3, 4) -> (-1, 0, 1, 0, 2)int lowbit(int x) { return (x == 0 ? -1 : __builtin_ctz(x)); }int lowbit(u32 x) { return (x == 0 ? -1 : __builtin_ctz(x)); }int lowbit(ll x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }int lowbit(u64 x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }template <typename T> T floor(T a, T b) {return a / b - (a % b && (a ^ b) < 0);}template <typename T> T ceil(T x, T y) { return floor(x + y - 1, y); }template <typename T> T bmod(T x, T y) { return x - y * floor(x, y); }template <typename T> pair<T, T> divmod(T x, T y) {T q = floor(x, y);return {q, x - q * y};}template <typename T, typename U> T SUM(const vector<U> &A) {T sm = 0;for(auto &&a : A)sm += a;return sm;}#define MIN(v) *min_element(all(v))#define MAX(v) *max_element(all(v))#define LB(c, x) distance((c).begin(), lower_bound(all(c), (x)))#define UB(c, x) distance((c).begin(), upper_bound(all(c), (x)))#define UNIQUE(x) \sort(all(x)), x.erase(unique(all(x)), x.end()), x.shrink_to_fit()template <typename T> T POP(deque<T> &que) {T a = que.front();que.pop_front();return a;}template <typename T> T POP(pq<T> &que) {T a = que.top();que.pop();return a;}template <typename T> T POP(pqg<T> &que) {T a = que.top();que.pop();return a;}template <typename T> T POP(vc<T> &que) {T a = que.back();que.pop_back();return a;}template <typename F>ll binary_search(F check, ll ok, ll ng, bool check_ok = true) {if(check_ok)assert(check(ok));while(abs(ok - ng) > 1) {auto x = (ng + ok) / 2;(check(x) ? ok : ng) = x;}return ok;}template <typename F>double binary_search_real(F check, double ok, double ng, int iter = 100) {FOR(iter) {double x = (ok + ng) / 2;(check(x) ? ok : ng) = x;}return (ok + ng) / 2;}template <class T, class S> inline bool chmax(T &a, const S &b) {return (a < b ? a = b, 1 : 0);}template <class T, class S> inline bool chmin(T &a, const S &b) {return (a > b ? a = b, 1 : 0);}// ? は -1vc<int> s_to_vi(const string &S, char first_char) {vc<int> A(S.size());FOR(i, S.size()) { A[i] = (S[i] != '?' ? S[i] - first_char : -1); }return A;}template <typename T, typename U> vector<T> cumsum(vector<U> &A, int off = 1) {int N = A.size();vector<T> B(N + 1);FOR(i, N) { B[i + 1] = B[i] + A[i]; }if(off == 0)B.erase(B.begin());return B;}// stable sorttemplate <typename T> vector<int> argsort(const vector<T> &A) {vector<int> ids(len(A));iota(all(ids), 0);sort(all(ids),[&](int i, int j) { return (A[i] == A[j] ? i < j : A[i] < A[j]); });return ids;}// A[I[0]], A[I[1]], ...template <typename T> vc<T> rearrange(const vc<T> &A, const vc<int> &I) {vc<T> B(len(I));FOR(i, len(I)) B[i] = A[I[i]];return B;}#endif#line 1 "library/other/io.hpp"#define FASTIO#include <unistd.h>// https://judge.yosupo.jp/submission/21623namespace fastio {static constexpr uint32_t SZ = 1 << 17;char ibuf[SZ];char obuf[SZ];char out[100];// pointer of ibuf, obufuint32_t pil = 0, pir = 0, por = 0;struct Pre {char num[10000][4];constexpr Pre() : num() {for(int i = 0; i < 10000; i++) {int n = i;for(int j = 3; j >= 0; j--) {num[i][j] = n % 10 | '0';n /= 10;}}}} constexpr pre;inline void load() {memcpy(ibuf, ibuf + pil, pir - pil);pir = pir - pil + fread(ibuf + pir - pil, 1, SZ - pir + pil, stdin);pil = 0;if(pir < SZ)ibuf[pir++] = '\n';}inline void flush() {fwrite(obuf, 1, por, stdout);por = 0;}void rd(char &c) {do {if(pil + 1 > pir)load();c = ibuf[pil++];} while(isspace(c));}void rd(string &x) {x.clear();char c;do {if(pil + 1 > pir)load();c = ibuf[pil++];} while(isspace(c));do {x += c;if(pil == pir)load();c = ibuf[pil++];} while(!isspace(c));}template <typename T> void rd_real(T &x) {string s;rd(s);x = stod(s);}template <typename T> void rd_integer(T &x) {if(pil + 100 > pir)load();char c;doc = ibuf[pil++];while(c < '-');bool minus = 0;if constexpr(is_signed<T>::value || is_same_v<T, i128>) {if(c == '-') {minus = 1, c = ibuf[pil++];}}x = 0;while('0' <= c) {x = x * 10 + (c & 15), c = ibuf[pil++];}if constexpr(is_signed<T>::value || is_same_v<T, i128>) {if(minus)x = -x;}}void rd(int &x) { rd_integer(x); }void rd(ll &x) { rd_integer(x); }void rd(i128 &x) { rd_integer(x); }void rd(u32 &x) { rd_integer(x); }void rd(u64 &x) { rd_integer(x); }void rd(u128 &x) { rd_integer(x); }void rd(double &x) { rd_real(x); }void rd(long double &x) { rd_real(x); }void rd(f128 &x) { rd_real(x); }template <class T, class U> void rd(pair<T, U> &p) {return rd(p.first), rd(p.second);}template <size_t N = 0, typename T> void rd_tuple(T &t) {if constexpr(N < std::tuple_size<T>::value) {auto &x = std::get<N>(t);rd(x);rd_tuple<N + 1>(t);}}template <class... T> void rd(tuple<T...> &tpl) { rd_tuple(tpl); }template <size_t N = 0, typename T> void rd(array<T, N> &x) {for(auto &d : x)rd(d);}template <class T> void rd(vc<T> &x) {for(auto &d : x)rd(d);}void read() {}template <class H, class... T> void read(H &h, T &...t) { rd(h), read(t...); }void wt(const char c) {if(por == SZ)flush();obuf[por++] = c;}void wt(const string s) {for(char c : s)wt(c);}void wt(const char *s) {size_t len = strlen(s);for(size_t i = 0; i < len; i++)wt(s[i]);}template <typename T> void wt_integer(T x) {if(por > SZ - 100)flush();if(x < 0) {obuf[por++] = '-', x = -x;}int outi;for(outi = 96; x >= 10000; outi -= 4) {memcpy(out + outi, pre.num[x % 10000], 4);x /= 10000;}if(x >= 1000) {memcpy(obuf + por, pre.num[x], 4);por += 4;} else if(x >= 100) {memcpy(obuf + por, pre.num[x] + 1, 3);por += 3;} else if(x >= 10) {int q = (x * 103) >> 10;obuf[por] = q | '0';obuf[por + 1] = (x - q * 10) | '0';por += 2;} elseobuf[por++] = x | '0';memcpy(obuf + por, out + outi + 4, 96 - outi);por += 96 - outi;}template <typename T> void wt_real(T x) {ostringstream oss;oss << fixed << setprecision(15) << double(x);string s = oss.str();wt(s);}void wt(int x) { wt_integer(x); }void wt(ll x) { wt_integer(x); }void wt(i128 x) { wt_integer(x); }void wt(u32 x) { wt_integer(x); }void wt(u64 x) { wt_integer(x); }void wt(u128 x) { wt_integer(x); }void wt(double x) { wt_real(x); }void wt(long double x) { wt_real(x); }void wt(f128 x) { wt_real(x); }template <class T, class U> void wt(const pair<T, U> val) {wt(val.first);wt(' ');wt(val.second);}template <size_t N = 0, typename T> void wt_tuple(const T t) {if constexpr(N < std::tuple_size<T>::value) {if constexpr(N > 0) {wt(' ');}const auto x = std::get<N>(t);wt(x);wt_tuple<N + 1>(t);}}template <class... T> void wt(tuple<T...> tpl) { wt_tuple(tpl); }template <class T, size_t S> void wt(const array<T, S> val) {auto n = val.size();for(size_t i = 0; i < n; i++) {if(i)wt(' ');wt(val[i]);}}template <class T> void wt(const vector<T> val) {auto n = val.size();for(size_t i = 0; i < n; i++) {if(i)wt(' ');wt(val[i]);}}void print() { wt('\n'); }template <class Head, class... Tail> void print(Head &&head, Tail &&...tail) {wt(head);if(sizeof...(Tail))wt(' ');print(forward<Tail>(tail)...);}// gcc expansion. called automaticall after main.void __attribute__((destructor)) _d() { flush(); }} // namespace fastiousing fastio::flush;using fastio::print;using fastio::read;#if defined(LOCAL)#define SHOW(...) \SHOW_IMPL(__VA_ARGS__, SHOW4, SHOW3, SHOW2, SHOW1)(__VA_ARGS__)#define SHOW_IMPL(_1, _2, _3, _4, NAME, ...) NAME#define SHOW1(x) print(#x, "=", (x)), flush()#define SHOW2(x, y) print(#x, "=", (x), #y, "=", (y)), flush()#define SHOW3(x, y, z) print(#x, "=", (x), #y, "=", (y), #z, "=", (z)), flush()#define SHOW4(x, y, z, w) \print(#x, "=", (x), #y, "=", (y), #z, "=", (z), #w, "=", (w)), flush()#else#define SHOW(...)#endif#define INT(...) \int __VA_ARGS__; \read(__VA_ARGS__)#define LL(...) \ll __VA_ARGS__; \read(__VA_ARGS__)#define U32(...) \u32 __VA_ARGS__; \read(__VA_ARGS__)#define U64(...) \u64 __VA_ARGS__; \read(__VA_ARGS__)#define STR(...) \string __VA_ARGS__; \read(__VA_ARGS__)#define CHAR(...) \char __VA_ARGS__; \read(__VA_ARGS__)#define DBL(...) \double __VA_ARGS__; \read(__VA_ARGS__)#define VEC(type, name, size) \vector<type> name(size); \read(name)#define VV(type, name, h, w) \vector<vector<type>> name(h, vector<type>(w)); \read(name)void YES(bool t = 1) { print(t ? "YES" : "NO"); }void NO(bool t = 1) { YES(!t); }void Yes(bool t = 1) { print(t ? "Yes" : "No"); }void No(bool t = 1) { Yes(!t); }void yes(bool t = 1) { print(t ? "yes" : "no"); }void no(bool t = 1) { yes(!t); }#include <iomanip> // for precision#include <iostream>#include <set>#include <vector>using namespace std;struct Point {long long x, y;};// カウント結果を保持する構造体struct CountResult {long long P, Q;};using namespace std;#include <atcoder/segtree>using namespace std;using namespace atcoder;// 座標圧縮用関数vector<int> compress_coordinates(const vector<long long> &values) {vector<long long> sorted_values = values;sort(sorted_values.begin(), sorted_values.end());sorted_values.erase(unique(sorted_values.begin(), sorted_values.end()),sorted_values.end());vector<int> compressed(values.size());for(size_t i = 0; i < values.size(); ++i) {compressed[i] =lower_bound(sorted_values.begin(), sorted_values.end(), values[i]) -sorted_values.begin();}return compressed;}// セグメント木に使用するモノイド// 区間の合計を管理するため、モノイドの操作は加算、単位元は0としますint op(int a, int b) { return a + b; }int e() { return 0; }CountResult calculate_P_Q(const vector<Point> &points) {vector<long long> y_vals;for(const auto &p : points) {y_vals.push_back(p.y);}// Yの座標圧縮vector<int> compressed_y = compress_coordinates(y_vals);int max_y = *max_element(compressed_y.begin(), compressed_y.end());// AtCoder Libraryのセグメント木segtree<int, op, e> seg_tree(max_y +1); // 座標圧縮後のY値に対応するセグメント木long long P = 0, Q = 0;long long prev_x = points[0].x;vector<int> y_values; // 圧縮されたY値のリストfor(size_t i = 0; i < points.size(); ++i) {const auto &p = points[i];int comp_y = compressed_y[i]; // 圧縮されたY値を取得if(p.x != prev_x) {// Xが変わったら、セグメント木にY値を追加for(const auto &y : y_values) {seg_tree.set(y, seg_tree.get(y) + 1); // 値を更新}y_values.clear();}// 現在のp.yより小さい値のカウント (0からcomp_yまでの区間)P += seg_tree.prod(0, comp_y);// 現在のp.yより大きい値のカウント (comp_y+1からmax_yまでの区間)Q += seg_tree.prod(comp_y + 1, max_y + 1);// Y値を保存して、次の段階でセグメント木に追加y_values.push_back(comp_y);prev_x = p.x;}return {P, Q};}int main() {int N;cin >> N;vector<Point> points(N);for(int i = 0; i < N; i++) {cin >> points[i].x >> points[i].y;}// Xの値で昇順にソート(Xが同じ場合はYでソート)sort(points.begin(), points.end(), [](const Point &a, const Point &b) {return a.x < b.x || (a.x == b.x && a.y < b.y);});// P と Q の計算CountResult result = calculate_P_Q(points);long long P = result.P;long long Q = result.Q;// 全ペア数// long long total_pairs = (long long)N * (N - 1) / 2;long long R = 0;long long S = 0;map<long long, long long> cnt_x;map<long long, long long> cnt_y;for(int i = 0; i < N; i++) {cnt_x[points[i].x]++;cnt_y[points[i].y]++;}// points forfor(int i = 0; i < N; i++) {R += N - (cnt_x[points[i].x]);S += N - (cnt_y[points[i].y]);}R /= 2;S /= 2;// cout << P << " " << Q << " " << R << " " << S << endl;// ケンドールの順位相関係数 τ の計算double tau = (double)(P - Q) / sqrt(double(R * S));// 結果の出力(精度に注意)cout << fixed << setprecision(16) << tau << endl;return 0;}