結果
| 問題 |
No.1675 Strange Minimum Query
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-09-10 21:41:05 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 1,062 ms / 2,000 ms |
| コード長 | 3,962 bytes |
| コンパイル時間 | 991 ms |
| コンパイル使用メモリ | 123,080 KB |
| 実行使用メモリ | 23,784 KB |
| 最終ジャッジ日時 | 2024-06-22 12:23:23 |
| 合計ジャッジ時間 | 23,481 ms |
|
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 |
|---|---|
| sample | AC * 3 |
| other | AC * 34 |
ソースコード
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, S: monoid
// opTT: T * T -> T
// opST: S * T * int -> T
// (s t_a) ... (s t_{b-1}) = opST(s, t_a ... t_{b-1}, b - a)
// opSS: S * S -> S
// query(a, b, s): t_a <- s t_a, ..., t_{b-1} <- s t_{b-1};
// returns t_a ... t_{b-1}
class SegmentTree(T, S, alias opTT, alias opST, alias opSS) {
import std.functional : binaryFun;
alias opTTFun = binaryFun!opTT;
alias opSTFun = opST;
alias opSSFun = binaryFun!opSS;
const(T) idT;
const(S) idS;
int n;
T[] ts;
S[] ss;
this(int n_, const(T) idT, const(S) idS) {
this.idT = idT;
this.idS = idS;
for (n = 1; n < n_; n <<= 1) {}
ts = new T[n << 1];
ss = new S[n << 1];
ts[] = idT;
ss[] = idS;
}
ref T at(int a) {
return ts[n + a];
}
void build() {
foreach_reverse (a; 1 .. n) ts[a] = opTTFun(ts[a << 1], ts[a << 1 | 1]);
}
T query(int a, int b, const(S) s) {
return query(1, 0, n, a, b, s);
}
private:
T query(int u, int l, int r, int a, int b, const(S) s) {
if (a < l) a = l;
if (b > r) b = r;
if (a >= b) return idT;
if (a == l && b == r) {
ts[u] = opSTFun(s, ts[u], r - l);
ss[u] = opSSFun(s, ss[u]);
return ts[u];
}
const int uL = u << 1, uR = u << 1 | 1;
const int mid = (l + r) >> 1;
// speed-up: if (ss[u] != idS)
{
ts[uL] = opSTFun(ss[u], ts[uL], mid - l);
ts[uR] = opSTFun(ss[u], ts[uR], r - mid);
ss[uL] = opSSFun(ss[u], ss[uL]);
ss[uR] = opSSFun(ss[u], ss[uR]);
ss[u] = idS;
}
const T resL = query(uL, l, mid, a, b, s);
const T resR = query(uR, mid, r, a, b, s);
ts[u] = opTTFun(ts[uL], ts[uR]);
return opTTFun(resL, resR);
}
}
void main() {
try {
for (; ; ) {
const N = readInt();
const Q = readInt();
auto L = new int[Q];
auto R = new int[Q];
auto B = new int[Q];
foreach (q; 0 .. Q) {
L[q] = readInt() - 1;
R[q] = readInt();
B[q] = readInt();
}
auto ans = new int[N];
auto seg0 = new SegmentTree!(int, int, max, (s, t, sz) => max(s, t), max)(N, 1, 1);
foreach (q; 0 .. Q) {
seg0.query(L[q], R[q], B[q]);
}
foreach (i; 0 .. N) {
ans[i] = seg0.query(i, i + 1, 1);
}
auto seg1 = new SegmentTree!(int, int, min, (s, t, sz) => min(s, t), min)(N, 10^^9 + 1, 10^^9 + 1);
foreach (i; 0 .. N) {
seg1.at(i) = ans[i];
}
seg1.build;
bool ok = true;
foreach (q; 0 .. Q) {
ok = ok && (seg1.query(L[q], R[q], 10^^9 + 1) == B[q]);
}
if (ok) {
foreach (i; 0 .. N) {
if (i > 0) write(" ");
write(ans[i]);
}
writeln;
} else {
writeln(-1);
}
}
} catch (EOFException e) {
}
}