結果

問題 No.1332 Range Nearest Query
ユーザー jupiro
提出日時 2021-01-23 15:53:03
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 378 ms / 2,500 ms
コード長 4,034 bytes
コンパイル時間 1,881 ms
コンパイル使用メモリ 146,644 KB
最終ジャッジ日時 2025-01-18 07:32:13
ジャッジサーバーID
(参考情報)
judge2 / judge4
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ファイルパターン 結果
other AC * 48
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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 <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>
#include <numeric>
#include <cctype>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <utility>
#include <fstream>
using namespace std;
typedef long long ll;
using ull = unsigned long long;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
//template<typename T> T gcd(T a, T b) { a = abs(a), b = abs(b); while (b > 0) { tie(a, b) = make_pair(b, a % b); }return a; }
//mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
constexpr long long INF = 1LL << 60;
constexpr int inf = 1000000007;
constexpr long long mod = 1000000007LL;
//constexpr long long mod = 998244353;
template<typename Monoid, typename F>
struct SegmentTree {
int sz;
vector<Monoid> seg;
const F f;
const Monoid IE;
SegmentTree(int n, const F f, const Monoid& IE) :f(f), IE(IE) {
sz = 1;
while (sz < n) sz *= 2;
seg.assign(2 * sz, IE);
}
void set(int k, const Monoid& x) {
seg[k + sz] = x;
}
void build() {
for (int k = sz - 1; k > 0; k--) {
seg[k] = f(seg[k * 2], seg[k * 2 + 1]);
}
}
void update(int k, const Monoid& x) {
k += sz;
seg[k] = x;
while (k /= 2) {
seg[k] = f(seg[k * 2], seg[k * 2 + 1]);
}
}
Monoid query(int a, int b) {
if (a >= b) return IE;
Monoid L = IE, R = IE;
for (a += sz, b += sz; a < b; a /= 2, b /= 2) {
if (a & 1) L = f(L, seg[a++]);
if (b & 1) R = f(seg[--b], R);
}
return f(L, R);
}
template<typename C>
int find_subtree(int idx, const C& check, Monoid& M, bool type) {
while (idx < sz) {
Monoid nxt = type ? f(seg[2 * idx + 1], M) : f(M, seg[2 * idx]);
if (check(nxt)) idx = idx * 2 + type;
else M = nxt, idx = idx * 2 + 1 - type;
}
return idx - sz;
}
template<typename C>
int min_left(int a, const C& check) {
Monoid L = IE;
if (a <= 0) {
if (check(f(L, seg[1]))) return find_subtree(1, check, L, false);
return -1;
}
int b = sz;
for (a += sz, b += sz; a < b; a >>= 1, b >>= 1) {
if (a & 1) {
Monoid nxt = f(L, seg[a]);
if (check(nxt)) return find_subtree(a, check, L, false);
L = nxt;
a += 1;
}
}
return -1;
}
template<typename C>
int max_right(int b, const C& check) {
Monoid R = IE;
if (b >= sz) {
if (check(f(seg[1], R))) return find_subtree(1, check, R, true);
return -1;
}
int a = 0;
for (a += sz, b += sz; a < b; a >>= 1, b >>= 1) {
if (b & 1) {
b -= 1;
Monoid nxt = f(seg[b], R);
if (check(nxt)) return find_subtree(b, check, R, true);
R = nxt;
}
}
return -1;
}
};
int main()
{
std::cin.tie(nullptr);
std::ios::sync_with_stdio(false);
int n; cin >> n;
vector<ll> X(n); for (auto& e : X) cin >> e;
int Q; cin >> Q;
vector<tuple<ll, int, int, int>> vt(Q);
for (int i = 0; i < Q; i++) {
int l, r, x; cin >> l >> r >> x;
l--;
vt[i] = make_tuple(x, l, r, i);
}
sort(vt.begin(), vt.end());
auto seg_mn = SegmentTree(n, [](ll a, ll b) {return min(a, b); }, INF);
auto seg_mx = SegmentTree(n, [](ll a, ll b) {return max(a, b); }, -INF);
using P = pair<ll, int>;
priority_queue<P, vector<P>, greater<>> pq;
for (int i = 0; i < n; i++) pq.emplace(X[i], i);
for (int i = 0; i < n; i++) seg_mn.set(i, X[i]);
seg_mn.build();
seg_mx.build();
vector<ll> ans(Q, INF);
for (auto [x, l, r, idx] : vt) {
while (!pq.empty() and pq.top().first <= x) {
auto [t, i] = pq.top();
pq.pop();
seg_mn.update(i, INF);
seg_mx.update(i, t);
}
ll res = INF;
chmin(res, x - seg_mx.query(l, r));
chmin(res, seg_mn.query(l, r) - x);
ans[idx] = res;
}
for (auto res : ans) cout << res << "\n";
}
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