結果

問題 No.1332 Range Nearest Query
ユーザー 👑 hos.lyric
提出日時 2021-01-08 22:41:45
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 451 ms / 2,500 ms
コード長 4,194 bytes
コンパイル時間 1,037 ms
コンパイル使用メモリ 132,224 KB
実行使用メモリ 34,200 KB
最終ジャッジ日時 2024-06-22 10:35:23
合計ジャッジ時間 18,781 ms
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

import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std
    .typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens
    .popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1;
    (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
// T: monoid
// op: T * T -> T
// query(a, b): returns t_a ... t_{b-1}
class SegmentTree(T, alias op) {
import std.functional : binaryFun;
alias opFun = binaryFun!op;
const(T) idT;
int n;
T[] ts;
this(int n_, const(T) idT) {
this.idT = idT;
for (n = 1; n < n_; n <<= 1) {}
ts = new T[n << 1];
ts[] = idT;
}
this(inout(T)[] ts_, const(T) idT) {
this.idT = idT;
const n_ = cast(int)(ts_.length);
for (n = 1; n < n_; n <<= 1) {}
ts = new T[n << 1];
ts[0 .. n] = idT;
ts[n .. n + n_] = ts_[];
ts[n + n_ .. n << 1] = idT;
build();
}
ref T at(int a) {
return ts[n + a];
}
void build() {
foreach_reverse (a; 1 .. n) ts[a] = opFun(ts[a << 1], ts[a << 1 | 1]);
}
void set(int a, const(T) val) {
ts[a += n] = val;
for (; a >>= 1; ) ts[a] = opFun(ts[a << 1], ts[a << 1 | 1]);
}
void mulL(int a, const(T) val) {
set(a, opFun(val, ts[a + n]));
}
void mulR(int a, const(T) val) {
set(a, opFun(ts[a + n], val));
}
T query(int a, int b) const {
T prodL = idT, prodR = idT;
for (a += n, b += n; a < b; a >>= 1, b >>= 1) {
if (a & 1) prodL = opFun(prodL, ts[a++]);
if (b & 1) prodR = opFun(ts[--b], prodR);
}
return opFun(prodL, prodR);
}
}
enum INF = 10^^9 + 1000;
void main() {
try {
for (; ; ) {
const N = readInt();
auto X = new int[N];
foreach (i; 0 .. N) {
X[i] = readInt();
}
const Q = readInt();
auto L = new int[Q];
auto R = new int[Q];
auto Y = new int[Q];
foreach (q; 0 .. Q) {
L[q] = readInt() - 1;
R[q] = readInt();
Y[q] = readInt();
}
alias Entry = Tuple!(int, "val", int, "key");
auto xs = new Entry[N];
foreach (i; 0 .. N) {
xs[i] = Entry(X[i], i);
}
xs.sort;
auto ys = new Entry[Q];
foreach (q; 0 .. Q) {
ys[q] = Entry(Y[q], q);
}
ys.sort;
auto ans = new int[Q];
ans[] = INF;
{
auto seg = new SegmentTree!(int, max)(N, -INF);
int pos = 0;
foreach (ref f; ys) {
const q = f.key;
for (; pos < N && xs[pos].val <= Y[q]; ) {
const i = xs[pos++].key;
seg.set(i, X[i]);
}
const res = seg.query(L[q], R[q]);
if (res > -INF) {
chmin(ans[q], Y[q] - res);
}
}
}
debug {
writeln("ans = ", ans);
}
{
auto seg = new SegmentTree!(int, min)(N, +INF);
int pos = N;
foreach_reverse (ref f; ys) {
const q = f.key;
for (; pos > 0 && xs[pos - 1].val >= Y[q]; ) {
const i = xs[--pos].key;
seg.set(i, X[i]);
}
const res = seg.query(L[q], R[q]);
if (res < +INF) {
chmin(ans[q], res - Y[q]);
}
}
}
foreach (q; 0 .. Q) {
writeln(ans[q]);
}
}
} catch (EOFException e) {
}
}
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