結果
問題 | No.1838 Modulo Straight |
ユーザー | tokusakurai |
提出日時 | 2022-02-11 23:11:29 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 555 ms / 2,000 ms |
コード長 | 6,853 bytes |
コンパイル時間 | 2,407 ms |
コンパイル使用メモリ | 218,328 KB |
実行使用メモリ | 35,608 KB |
最終ジャッジ日時 | 2024-06-27 21:31:11 |
合計ジャッジ時間 | 14,799 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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
6,816 KB |
testcase_01 | AC | 1 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 3 ms
6,944 KB |
testcase_04 | AC | 3 ms
6,940 KB |
testcase_05 | AC | 3 ms
6,944 KB |
testcase_06 | AC | 3 ms
6,944 KB |
testcase_07 | AC | 3 ms
6,944 KB |
testcase_08 | AC | 3 ms
6,940 KB |
testcase_09 | AC | 4 ms
6,940 KB |
testcase_10 | AC | 4 ms
6,944 KB |
testcase_11 | AC | 551 ms
34,456 KB |
testcase_12 | AC | 554 ms
34,536 KB |
testcase_13 | AC | 543 ms
35,608 KB |
testcase_14 | AC | 549 ms
34,708 KB |
testcase_15 | AC | 555 ms
34,580 KB |
testcase_16 | AC | 474 ms
25,048 KB |
testcase_17 | AC | 479 ms
25,092 KB |
testcase_18 | AC | 470 ms
25,168 KB |
testcase_19 | AC | 437 ms
20,888 KB |
testcase_20 | AC | 432 ms
21,016 KB |
testcase_21 | AC | 436 ms
21,012 KB |
testcase_22 | AC | 134 ms
31,584 KB |
testcase_23 | AC | 133 ms
32,648 KB |
testcase_24 | AC | 122 ms
17,876 KB |
testcase_25 | AC | 177 ms
17,792 KB |
testcase_26 | AC | 201 ms
17,916 KB |
testcase_27 | AC | 273 ms
16,736 KB |
testcase_28 | AC | 280 ms
15,004 KB |
testcase_29 | AC | 307 ms
15,796 KB |
testcase_30 | AC | 330 ms
16,024 KB |
testcase_31 | AC | 353 ms
16,632 KB |
testcase_32 | AC | 382 ms
17,536 KB |
testcase_33 | AC | 444 ms
25,176 KB |
testcase_34 | AC | 440 ms
25,172 KB |
testcase_35 | AC | 395 ms
19,064 KB |
testcase_36 | AC | 369 ms
17,940 KB |
testcase_37 | AC | 338 ms
15,348 KB |
testcase_38 | AC | 294 ms
15,248 KB |
testcase_39 | AC | 80 ms
12,956 KB |
testcase_40 | AC | 2 ms
6,944 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for (int i = 0; i < n; i++) #define rep2(i, x, n) for (int i = x; i <= n; i++) #define rep3(i, x, n) for (int i = x; i >= n; i--) #define each(e, v) for (auto &e : v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; template <typename T> bool chmax(T &x, const T &y) { return (x < y) ? (x = y, true) : false; } template <typename T> bool chmin(T &x, const T &y) { return (x > y) ? (x = y, true) : false; } template <typename T> int flg(T x, int i) { return (x >> i) & 1; } template <typename T> void print(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' '); if (v.empty()) cout << '\n'; } template <typename T> void printn(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << '\n'; } template <typename T> int lb(const vector<T> &v, T x) { return lower_bound(begin(v), end(v), x) - begin(v); } template <typename T> int ub(const vector<T> &v, T x) { return upper_bound(begin(v), end(v), x) - begin(v); } template <typename T> void rearrange(vector<T> &v) { sort(begin(v), end(v)); v.erase(unique(begin(v), end(v)), end(v)); } template <typename T> vector<int> id_sort(const vector<T> &v, bool greater = false) { int n = v.size(); vector<int> ret(n); iota(begin(ret), end(ret), 0); sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; }); return ret; } template <typename S, typename T> pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first + q.first, p.second + q.second); } template <typename S, typename T> pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first - q.first, p.second - q.second); } template <typename S, typename T> istream &operator>>(istream &is, pair<S, T> &p) { S a; T b; is >> a >> b; p = make_pair(a, b); return is; } template <typename S, typename T> ostream &operator<<(ostream &os, const pair<S, T> &p) { return os << p.first << ' ' << p.second; } struct io_setup { io_setup() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; const int inf = (1 << 30) - 1; const ll INF = (1LL << 60) - 1; const int MOD = 1000000007; // const int MOD = 998244353; template <typename T> struct Binary_Indexed_Tree { vector<T> bit; const int n; Binary_Indexed_Tree(const vector<T> &v) : n((int)v.size()) { bit.resize(n + 1); copy(begin(v), end(v), begin(bit) + 1); for (int a = 2; a <= n; a <<= 1) { for (int b = a; b <= n; b += a) bit[b] += bit[b - a / 2]; } } Binary_Indexed_Tree(int n, const T &x) : n(n) { bit.resize(n + 1); vector<T> v(n, x); copy(begin(v), end(v), begin(bit) + 1); for (int a = 2; a <= n; a <<= 1) { for (int b = a; b <= n; b += a) bit[b] += bit[b - a / 2]; } } void add(int i, const T &x) { for (i++; i <= n; i += (i & -i)) bit[i] += x; } void change(int i, const T &x) { add(i, x - query(i, i + 1)); } T sum(int i) const { T ret = 0; for (; i > 0; i -= (i & -i)) ret += bit[i]; return ret; } T query(int l, int r) const { return sum(r) - sum(l); } T operator[](int i) const { return query(i, i + 1); } int lower_bound(T x) const { int ret = 0; for (int k = 31 - __builtin_clz(n); k >= 0; k--) { if (ret + (1 << k) <= n && bit[ret + (1 << k)] < x) x -= bit[ret += (1 << k)]; } return ret; } int upper_bound(T x) const { int ret = 0; for (int k = 31 - __builtin_clz(n); k >= 0; k--) { if (ret + (1 << k) <= n && bit[ret + (1 << k)] <= x) x -= bit[ret += (1 << k)]; } return ret; } }; template <typename T> long long inversion_number(const vector<T> &a) { int n = a.size(); vector<int> v(n); iota(begin(v), end(v), 0); sort(begin(v), end(v), [&](int i, int j) { if (a[i] != a[j]) return a[i] < a[j]; return i < j; }); Binary_Indexed_Tree<int> bit(n, 0); long long ret = 0; for (int i = 0; i < n; i++) { ret += bit.query(v[i] + 1, n); bit.add(v[i], 1); } return ret; } template <typename T> long long inversion_number(const vector<T> &a, const vector<T> &b) { // a を b に変換するのに必要な最小バブルソート回数 int n = a.size(); assert(b.size() == n); vector<int> u(n), v(n); iota(begin(u), end(u), 0); sort(begin(u), end(u), [&](int i, int j) { if (a[i] != a[j]) return a[i] < a[j]; return i < j; }); iota(begin(v), end(v), 0); sort(begin(v), end(v), [&](int i, int j) { if (b[i] != b[j]) return b[i] < b[j]; return i < j; }); vector<int> w(n); for (int i = 0; i < n; i++) { if (a[u[i]] != b[v[i]]) return -1; w[v[i]] = u[i]; } Binary_Indexed_Tree<int> bit(n, 0); long long ret = 0; for (int i = 0; i < n; i++) { ret += bit.query(w[i] + 1, n); bit.add(w[i], 1); } return ret; } int main() { int M, K; cin >> M >> K; vector<int> a(M * K); rep(i, M * K) cin >> a[i]; vector<vector<int>> ids(M); rep(i, M * K) ids[a[i]].eb(i); vector<int> b(M * K); rep(i, M) { rep(j, K) { b[M * j + i] = ids[i][j]; // } } // print(b); ll tmp = inversion_number(b); ll ans = tmp; // cout << tmp << '\n'; vector<vector<int>> xs(K); rep(i, K) { rep(t, 2) { int j = (i + t) % K; if (j < 0 || j >= K) continue; rep(k, M) xs[i].eb(ids[k][j]); } rearrange(xs[i]); // print(xs[i]); } vector<Binary_Indexed_Tree<int>> bit; rep(i, K) bit.eb(sz(xs[i]), 0); rep(i, M) { rep(j, K) { int x = lb(xs[j], ids[i][j]); bit[j].add(x, 1); } } rep(i, M) { rep(j, K) { int x = lb(xs[j], ids[i][j]); int l = bit[j].query(0, x), r = bit[j].query(x + 1, sz(xs[j])); tmp -= l, tmp += r; // bit[j].add(x, -1); } rep(j, K) { int k = (j + K - 1) % K; int x = lb(xs[k], ids[i][j]); // bit[k].add(x, 1); } // cout << tmp << '\n'; chmin(ans, tmp); } cout << ans << '\n'; }