結果
問題 | No.1371 交換門松列・松 |
ユーザー | fuppy_kyopro |
提出日時 | 2021-01-29 22:17:05 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 190 ms / 4,000 ms |
コード長 | 6,972 bytes |
コンパイル時間 | 3,815 ms |
コンパイル使用メモリ | 215,552 KB |
実行使用メモリ | 12,164 KB |
最終ジャッジ日時 | 2024-06-27 08:33:24 |
合計ジャッジ時間 | 7,485 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 131 ms
12,164 KB |
testcase_19 | AC | 131 ms
12,032 KB |
testcase_20 | AC | 128 ms
11,900 KB |
testcase_21 | AC | 128 ms
11,968 KB |
testcase_22 | AC | 131 ms
12,028 KB |
testcase_23 | AC | 189 ms
12,032 KB |
testcase_24 | AC | 189 ms
11,904 KB |
testcase_25 | AC | 189 ms
11,948 KB |
testcase_26 | AC | 186 ms
11,908 KB |
testcase_27 | AC | 189 ms
12,028 KB |
testcase_28 | AC | 190 ms
11,904 KB |
testcase_29 | AC | 189 ms
12,052 KB |
testcase_30 | AC | 185 ms
12,128 KB |
testcase_31 | AC | 186 ms
11,900 KB |
ソースコード
//* #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") //*/ #include <bits/stdc++.h> // #include <atcoder/all> using namespace std; // using namespace atcoder; #define DEBUG(x) cerr<<#x<<": "<<x<<endl; #define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl; #define DEBUG_MAT(v) cerr<<#v<<endl;for(int i=0;i<v.size();i++){for(int j=0;j<v[i].size();j++) {cerr<<v[i][j]<<" ";}cerr<<endl;} typedef long long ll; // #define int ll #define vi vector<int> #define vl vector<ll> #define vii vector< vector<int> > #define vll vector< vector<ll> > #define vs vector<string> #define pii pair<int,int> #define pis pair<int,string> #define psi pair<string,int> #define pll pair<ll,ll> template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); } template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); } template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; } #define X first #define Y second #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 rrep(i,n) for(int i=(int)(n)-1;i>=0;i--) #define rrep1(i,n) for(int i=(int)(n);i>0;i--) #define REP(i,a,b) for(int i=a;i<b;i++) #define in(x, a, b) (a <= x && x < b) #define all(c) c.begin(),c.end() void YES(bool t=true) {cout<<(t?"YES":"NO")<<endl;} void Yes(bool t=true) {cout<<(t?"Yes":"No")<<endl;} void yes(bool t=true) {cout<<(t?"yes":"no")<<endl;} void NO(bool t=true) {cout<<(t?"NO":"YES")<<endl;} void No(bool t=true) {cout<<(t?"No":"Yes")<<endl;} void no(bool t=true) {cout<<(t?"no":"yes")<<endl;} template<class T> bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; } template<class T> bool chmin(T &a, const T &b) { if (a>b) { a = b; return 1; } return 0; } #define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end()); const ll inf = 1000000001; const ll INF = (ll)1e18 + 1; const long double pi = 3.1415926535897932384626433832795028841971L; int popcount(ll t) { return __builtin_popcountll(t); } // int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1}; // int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 }; vi dx = {0, 1, 0, -1}, dy = {-1, 0, 1, 0}; // vi dx2 = { 1,1,0,-1,-1,-1,0,1 }, dy2 = { 0,1,1,1,0,-1,-1,-1 }; struct Setup_io { Setup_io() { ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0); cout << fixed << setprecision(25); } } setup_io; const ll MOD = 1000000007; // const ll MOD = 998244353; // #define mp make_pair //#define endl '\n' template <typename T> class SegmentTree { public: using F = function<T(T&, T&)>; int n; vector<T > dat; T e; // �P�ʌ� F query_func; F update_func; SegmentTree(vector<T> a, F query_func, F update_func, T e) :n(a.size()), query_func(query_func), update_func(update_func), e(e) { if (n == 0) { a.push_back(e); n++; } dat.resize(4 * n); init(0, 0, n, a); } void init(int k, int l, int r, vector<T> &a) { if (r - l == 1) { dat[k] = a[l]; } else { int lch = 2 * k + 1, rch = 2 * k + 2; init(lch, l, (l + r) / 2, a); init(rch, (l + r) / 2, r, a); dat[k] = query_func(dat[lch], dat[rch]); } } //k�Ԗڂ̒l��a�ɕύX void update(int k, T a, int v, int l, int r) { if (r - l == 1) { dat[v] = update_func(dat[v], a); } else { if (k < (l + r) / 2) update(k, a, 2 * v + 1, l, (l + r) / 2); else { update(k, a, 2 * v + 2, (l + r) / 2, r); } dat[v] = query_func(dat[v * 2 + 1], dat[v * 2 + 2]); } } //[a,b)�̍ŏ��l�����߂� //���̂ق��̈����͌v�Z�̊ȒP�̂��߂̈��� //k�͐ړ_�̔ԍ�,l,r�͂��̐ړ_��[l,r)�ɑΉ����Ă��邱�Ƃ�\�� //�]���āA�O�����query(a,b,0,0,n)�Ƃ��Ă�� T query(int a, int b, int k, int l, int r) { if (r <= a || b <= l) { return e; } if (a <= l && r <= b) { return dat[k]; } else { T ul = query(a, b, k * 2 + 1, l, (l + r) / 2); T ur = query(a, b, k * 2 + 2, (l + r) / 2, r); return query_func(ul, ur); } } // ���������ĉE��T�� int find(int a, int b, int k, int l, int r, int x) { // ������ if (dat[k] < x || r <= a || b <= l) return -1; if (l + 1 == r) { // ������ if (dat[k] >= x) return l; else return -1; } int rv = find(a, b, 2 * k + 2, (l + r) / 2, r, x); if (rv != -1) return rv; return find(a, b, 2 * k + 1, l, (l + r) / 2, x); } }; int f(int a, int b) {return a + b;} int g(int a, int b) {return a + b;} ll solve1(vi a) { int n = a.size(); int rem; if (a[0] < a[1]) rem = 1; else rem = 0; vector<pii> ue; for (int i = rem; i < n; i += 2) { int side = -inf; if (i != 0) chmax(side, a[i - 1]); if (i != n - 1) chmax(side, a[i + 1]); ue.push_back(pii(a[i], side)); } sort(all(ue)); reverse(all(ue)); vi num(n); rep (i, ue.size()) num[ue[i].first]++; SegmentTree<int> seg(num, f, g, 0); ll ans = 0; rep (i, ue.size()) { int x = ue[i].first; seg.update(x, -1, 0, 0, seg.n); int side = ue[i].second; ans += seg.query(side + 1, n, 0, 0, seg.n); } return ans; } ll solve2(vi a) { int n = a.size(); int rem; if (a[0] < a[1]) rem = 1; else rem = 0; vector<pii> ue; for (int i = rem; i < n; i += 2) { int side = -inf; if (i != 0) chmax(side, a[i - 1]); if (i != n - 1) chmax(side, a[i + 1]); ue.push_back(pii(side, a[i])); } vector<pii> sita; for (int i = 1 - rem; i < n; i += 2) { int side = inf; if (i != 0) chmin(side, a[i - 1]); if (i != n - 1) chmin(side, a[i + 1]); sita.push_back(pii(a[i], side)); } sort(all(ue)); sort(all(sita)); vi num(n); rep (i, sita.size()) num[sita[i].second]++; SegmentTree<int> seg(num, f, g, 0); int si = 0; ll ans = 0; rep (i, ue.size()) { int x = ue[i].first; while (si < sita.size() and sita[si].first <= x) { int val = sita[si].second; seg.update(val, -1, 0, 0, seg.n); si++; } int y = ue[i].second; ans += seg.query(y + 1, n, 0, 0, seg.n); } return ans; } signed main() { int n; cin >> n; vi a(n); rep (i, n) { cin >> a[i]; a[i]--; } ll ans = solve1(a); vi b(n); rep (i, n) b[i] = n - 1 - a[i]; ans += solve1(b); ans += solve2(a); cout << ans << endl; }