結果

問題 No.2242 Cities and Teleporters
ユーザー tokusakurai
提出日時 2023-03-10 22:07:22
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 374 ms / 3,000 ms
コード長 4,113 bytes
コンパイル時間 2,061 ms
コンパイル使用メモリ 206,144 KB
最終ジャッジ日時 2025-02-11 08:27:19
ジャッジサーバーID
(参考情報)
judge5 / judge1
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ファイルパターン 結果
other AC * 26
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define per(i, n) for (int i = (n)-1; i >= 0; i--)
#define rep2(i, l, r) for (int i = (l); i < (r); i++)
#define per2(i, l, r) for (int i = (r)-1; i >= (l); i--)
#define each(e, v) for (auto &e : v)
#define MM << " " <<
#define pb push_back
#define eb emplace_back
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#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>
using minheap = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using maxheap = priority_queue<T>;
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;
int main() {
int N;
cin >> N;
vector<int> H(N), T(N);
rep(i, N) cin >> H[i];
rep(i, N) cin >> T[i];
auto xs = T;
rearrange(xs);
int K = sz(xs);
rep(i, N) {
H[i] = lb(xs, H[i]);
T[i] = lb(xs, T[i]);
}
vector<int> mi(K, inf);
rep(i, N) chmin(mi[T[i]], H[i]);
per(i, K - 1) chmin(mi[i], mi[i + 1]);
// print(mi);
vector<vector<int>> next(20, vector<int>(K, K));
next[0] = mi;
rep(i, 19) {
rep(j, K) {
int k = next[i][j];
if (k < K) next[i + 1][j] = next[i][k];
}
}
// rep(i, 20) print(next[i]);
int Q;
cin >> Q;
while (Q--) {
int u, v;
cin >> u >> v;
u--, v--;
u = T[u], v = H[v];
// cout << u MM v << '\n';
if (v <= u) {
cout << "1\n";
continue;
}
if (v == K || next[19][v] > u) {
cout << "-1\n";
continue;
}
int ans = 0;
per(i, 20) {
if (next[i][v] <= u) continue;
v = next[i][v];
ans += 1 << i;
}
assert(next[0][v] <= u);
cout << ans + 2 << '\n';
}
}
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