結果
| 問題 |
No.1054 Union add query
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-05-15 21:41:44 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 579 ms / 2,000 ms |
| コード長 | 3,478 bytes |
| コンパイル時間 | 847 ms |
| コンパイル使用メモリ | 122,376 KB |
| 実行使用メモリ | 57,964 KB |
| 最終ジャッジ日時 | 2024-06-22 07:00:17 |
| 合計ジャッジ時間 | 5,985 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 8 |
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)); }
void bAdd(T)(T[] bit, int pos, T val)
in {
assert(0 <= pos && pos < bit.length, "bAdd: 0 <= pos < |bit| must hold");
}
do {
for (int x = pos; x < bit.length; x |= x + 1) {
bit[x] += val;
}
}
// sum of [0, pos)
T bSum(T)(T[] bit, int pos)
in {
assert(0 <= pos && pos <= bit.length, "bSum: 0 <= pos <= |bit| must hold");
}
do {
T ret = 0;
for (int x = pos - 1; x >= 0; x = (x & (x + 1)) - 1) {
ret += bit[x];
}
return ret;
}
int root(int[] uf, int u) {
return (uf[u] < 0) ? u : (uf[u] = uf.root(uf[u]));
}
bool connect(int[] uf, int u, int v) {
u = uf.root(u);
v = uf.root(v);
if (u == v) return false;
if (uf[u] > uf[v]) swap(u, v);
uf[u] += uf[v];
uf[v] = u;
return true;
}
int V;
int[][] graph;
int zeit;
int[] dis, fin;
void dfs(int u) {
dis[u] = zeit++;
foreach (v; graph[u]) {
dfs(v);
}
fin[u] = zeit++;
}
void main() {
try {
for (; ; ) {
const N = readInt();
const Q = readInt();
auto T = new int[Q];
auto A = new int[Q];
auto B = new int[Q];
foreach (q; 0 .. Q) {
T[q] = readInt();
A[q] = readInt();
B[q] = readInt();
--A[q];
if (T[q] == 1) {
--B[q];
}
}
auto as = new int[Q];
as[] = -1;
auto uf = new int[N];
uf[] = -1;
auto us = iota(N).array;
V = N;
graph = new int[][2 * N - 1];
foreach (q; 0 .. Q) {
if (T[q] == 1) {
const ra = uf.root(A[q]);
const rb = uf.root(B[q]);
if (ra != rb) {
uf.connect(ra, rb);
const u = V++;
graph[u] ~= us[ra];
graph[u] ~= us[rb];
us[uf.root(ra)] = u;
}
} else {
as[q] = us[uf.root(A[q])];
}
}
zeit = 0;
dis = new int[V];
fin = new int[V];
dis[] = -1;
foreach_reverse (u; 0 .. V) {
if (dis[u] == -1) {
dfs(u);
}
}
auto bit = new long[zeit + 1];
foreach (q; 0 .. Q) {
if (T[q] == 2) {
bit.bAdd(dis[as[q]], +B[q]);
bit.bAdd(fin[as[q]], -B[q]);
} else if (T[q] == 3) {
const ans = bit.bSum(fin[A[q]]);
writeln(ans);
}
}
}
} catch (EOFException e) {
}
}