結果
問題 | No.1768 The frog in the well knows the great ocean. |
ユーザー |
|
提出日時 | 2021-10-23 20:28:45 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 689 ms / 3,000 ms |
コード長 | 1,974 bytes |
コンパイル時間 | 3,398 ms |
コンパイル使用メモリ | 211,572 KB |
最終ジャッジ日時 | 2025-01-25 05:00:11 |
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 * 1 |
other | AC * 27 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i,n) for(int i=0;i<n;++i)template<class T> inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; }return false; }template<class T> inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; }return false; }template<class Op> class SparseTable {using T = typename Op::T;vector<vector<T>> dat;vector<int> len;int n, log;public:SparseTable(const vector<T>& a) : n(a.size()), log(log2(n)) {dat = vector<vector<T>>(log + 1, vector<T>(n));len.resize(n + 1);rep(i, n)dat[0][i] = a[i];rep(j, log)rep(i, n - (1 << j)) {dat[j + 1][i] = Op::comp(dat[j][i], dat[j][i + (1 << j)]);}for (int i = 2; i <= n; ++i)len[i] = len[i >> 1] + 1;}T value(int l, int r) {int k = len[r - l];return Op::comp(dat[k][l], dat[k][r - (1 << k)]);}};template<class Type> struct node {using T = Type;inline static T comp(T x, T y) { return max(x, y); }};void solve() {int n; cin >> n;vector<int> a(n), b(n);rep(i, n) {cin >> a[i];--a[i];}rep(i, n) {cin >> b[i];--b[i];}set<int> sa, sb;rep(i, n)sa.insert(i);vector<vector<pair<int, int>>> p(n);rep(i, n)p[a[i]].emplace_back(i, true);rep(i, n)p[b[i]].emplace_back(i, false);SparseTable<node<int>> sp(a);for (auto& val : p) {for (auto [i, f] : val)if (f)sa.erase(i);for (auto [i, f] : val) {if (f)continue;int l = -1, r = n;for (auto it = sa.lower_bound(i);;) {if (it != sa.begin())chmax(l, *prev(it));if (it != sa.end())chmin(r, *it);break;}for (auto it = sb.lower_bound(i);;) {if (it != sb.begin())chmax(l, *prev(it));if (it != sb.end())chmin(r, *it);break;}++l, --r;if (r < i || i < l || l > r || sp.value(l, r + 1) != b[i]) {cout << "No\n";return;}}for (auto [i, f] : val)if (!f)sb.insert(i);}cout << "Yes\n";}int main() {int t; cin >> t;while (t--)solve();return 0;}