結果

問題 No.2242 Cities and Teleporters
ユーザー t98slider
提出日時 2023-03-10 23:10:25
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 367 ms / 3,000 ms
コード長 5,768 bytes
コンパイル時間 1,823 ms
コンパイル使用メモリ 178,216 KB
実行使用メモリ 40,732 KB
最終ジャッジ日時 2024-09-18 05:20:38
合計ジャッジ時間 9,829 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
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ファイルパターン 結果
other AC * 26
権限があれば一括ダウンロードができます

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>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define codefor int test;cin>>test;while(test--)
#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)
#define vector2d(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))
#define vector3d(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))
using namespace std;
using ll = long long;
template<class T> using rpriority_queue = priority_queue<T, vector<T>, greater<T>>;
template<class T> istream& operator>>(istream& is, vector<T>& vec) {for(T& x : vec)is >> x;return is;}
template<class T> ostream& operator<<(ostream& os, const vector<T>& vec) {if(vec.empty())return os;os << vec[0];for(auto it = vec.begin(); ++it!= vec
    .end();)os << ' ' << *it;return os;}
void in(){}
template <class Head, class... Tail> void in(Head& head, Tail&... tail){cin >> head;in(tail...);}
void out(){cout << '\n';}
template<class T>void out(const T& a){cout << a << '\n';}
template <class Head, class... Tail> void out(const Head& head,const Tail&... tail){cout << head << ' ';out(tail...);}
const int INF = 1 << 30;
const long long INF2 = 1ll << 60;
template<class T> void chmax(T &a,const T b){if(b>a)a=b;}
template<class T> void chmin(T &a,const T b){if(b<a)a=b;}
template <class S, S (*op)(S, S), S (*e)()> struct segtree {
public:
segtree() : segtree(0) {}
segtree(int n) : segtree(std::vector<S>(n, e())) {}
segtree(const std::vector<S>& v) : _n(int(v.size())) {
log = ceil_pow2(_n);
size = 1 << log;
d = std::vector<S>(2 * size, e());
for (int i = 0; i < _n; i++) d[size + i] = v[i];
for (int i = size - 1; i >= 1; i--) {
update(i);
}
}
void set(int p, S x) {
assert(0 <= p && p < _n);
p += size;
d[p] = x;
for (int i = 1; i <= log; i++) update(p >> i);
}
S get(int p) {
assert(0 <= p && p < _n);
return d[p + size];
}
const S operator[](int p) const { return get(p); }
S operator[](int p) { return get(p); }
S prod(int l, int r) {
assert(0 <= l && l <= r && r <= _n);
S sml = e(), smr = e();
l += size;
r += size;
while (l < r) {
if (l & 1) sml = op(sml, d[l++]);
if (r & 1) smr = op(d[--r], smr);
l >>= 1;
r >>= 1;
}
return op(sml, smr);
}
S all_prod() { return d[1]; }
template <bool (*f)(S)> int max_right(int l) {
return max_right(l, [](S x) { return f(x); });
}
template <class F> int max_right(int l, F f) {
assert(0 <= l && l <= _n);
assert(f(e()));
if (l == _n) return _n;
l += size;
S sm = e();
do {
while (l % 2 == 0) l >>= 1;
if (!f(op(sm, d[l]))) {
while (l < size) {
l = (2 * l);
if (f(op(sm, d[l]))) {
sm = op(sm, d[l]);
l++;
}
}
return l - size;
}
sm = op(sm, d[l]);
l++;
} while ((l & -l) != l);
return _n;
}
template <bool (*f)(S)> int min_left(int r) {
return min_left(r, [](S x) { return f(x); });
}
template <class F> int min_left(int r, F f) {
assert(0 <= r && r <= _n);
assert(f(e()));
if (r == 0) return 0;
r += size;
S sm = e();
do {
r--;
while (r > 1 && (r % 2)) r >>= 1;
if (!f(op(d[r], sm))) {
while (r < size) {
r = (2 * r + 1);
if (f(op(d[r], sm))) {
sm = op(d[r], sm);
r--;
}
}
return r + 1 - size;
}
sm = op(d[r], sm);
} while ((r & -r) != r);
return 0;
}
private:
int _n, size, log;
std::vector<S> d;
int ceil_pow2(int n) {
int x = 0;
while ((1U << x) < (unsigned int)(n)) x++;
return x;
}
void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
};
int op(int lhs, int rhs){
return max(lhs, rhs);
}
int e(){
return 0;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<int> ca, h(n), t(n);
cin >> h >> t;
ca = h;
ca.insert(ca.end(), all(t));
sort(all(ca));
ca.erase(unique(all(ca)), ca.end());
vector<int> mx(ca.size());
for(int i = 0; i < n; i++){
h[i] = lower_bound(ca.begin(), ca.end(), h[i]) - ca.begin();
t[i] = lower_bound(ca.begin(), ca.end(), t[i]) - ca.begin();
chmax(mx[h[i]], t[i]);
}
//cerr << h << '\n';
//cerr << t << '\n';
//segtree<int, op, e> seg(mx);
vector<vector<int>> dp(20, vector<int>(ca.size()));
int mxv = 0;
for(int i = 0; i < ca.size(); i++){
chmax(mxv, mx[i]);
dp[0][i] = mxv;
}
for(int i = 1; i < 20; i++){
for(int j = 0; j < ca.size(); j++){
dp[i][j] = dp[i - 1][dp[i - 1][j]];
}
}
int Q;
cin >> Q;
while(Q--){
int u, v;
cin >> u >> v;
u--, v--;
if(h[v] <= t[u]){
out(1);
continue;
}
int ans = 0, cur = t[u];
for(int i = 19; i >= 0; i--){
if(dp[i][cur] < h[v]){
cur = dp[i][cur];
ans += 1 << i;
}
}
if(ans >= n) ans = -1;
else ans += 2;
out(ans);
}
}
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