Merge pull request yosupo06#1257 from maspypy/1256

テストケース追加

tree/lca/gen/almost_line.cpp

@@ -0,0 +1,64 @@
+#include <iostream>
+#include <queue>
+#include "../params.h"
+#include "random.h"
+
+using namespace std;
+
+// vertex add path sum からもってきたもの
+int main(int, char* argv[]) {
+  long long seed = atoll(argv[1]);
+  auto gen = Random(seed);
+
+  int n = N_MAX;
+  int q = Q_MAX;
+  printf("%d %d\n", n, q);
+
+  // parent の列が必要
+  vector<int> par(n, -1);
+  for (int i = 0; i < n - (n / 2); i++) {
+    // u[i] = i;
+    // v[i] = i + 1;
+    par[i + 1] = i;
+  }
+  for (int i = n - (n / 2); i < n - 1; i++) {
+    // u[i] = gen.uniform(0, i);
+    // v[i] = i + 1;
+    par[i + 1] = gen.uniform(0, i);
+  }
+  // 頂点ラベルをシャッフルしたいが, p[i]<i にする必要がある
+  // ランダム優先順位でトポロジカル順序をとる
+  priority_queue<pair<int, int>> que;
+  auto add_que = [&](int v) -> void {
+    int pri = gen.uniform<int>(0, 1'000'000'000);
+    que.emplace(pri, v);
+  };
+  add_que(0);
+
+  vector<vector<int>> ch(n);
+  for (int i = 1; i < n; ++i) ch[par[i]].emplace_back(i);
+
+  vector<int> new_idx(n);
+  for (int i = 0; i < n; ++i) {
+    int v = que.top().second;
+    que.pop();
+    new_idx[v] = i;
+    for (auto& w: ch[v]) add_que(w);
+  }
+
+  vector<int> tmp(n, -1);
+  for (int i = 1; i < n; ++i) { tmp[new_idx[i]] = new_idx[par[i]]; }
+  swap(par, tmp);
+
+  for (int i = 1; i < n; ++i) {
+    if (i > 1) printf(" ");
+    printf("%d", par[i]);
+  }
+  printf("\n");
+
+  for (int i = 0; i < q; i++) {
+    auto [u, v] = gen.uniform_pair<int>(0, n - 1);
+    printf("%d %d\n", u, v);
+  }
+  return 0;
+}

tree/lca/hash.json

@@ -1,4 +1,8 @@
 {
+  "almost_line_00.in": "ea3f1411571fa29bbaaa70c407c19168382c40a1ea4189823dcd394ed155fd1b",
+  "almost_line_00.out": "bfff4a3ba6228102152ba4c039b139f42b65a78ba15d2c50e2507f565b36eda1",
+  "almost_line_01.in": "8d8360a96a0e1ffefa8c7ed04b09c86c24ffa3d181d29862128bcb45b23420e1",
+  "almost_line_01.out": "4cbd1c40f987819aa0ef69ba778deede4471d30f935eac5af5d4f6ba78cd0b84",
   "binary_00.in": "6e7c16bc8af7a039b1ac60ce46b085b7950381faf413d4006f6e668ca229707a",
   "binary_00.out": "dd71c4b7b1c5dde2bade5e3510230c71b894200f39431c60e6b69454b4ec5155",
   "binary_01.in": "20d7fb5dd98dbef4ba16e080dd80b1b729d9c0044231f2baeb4aaa6c540c41e6",

tree/lca/info.toml

@@ -30,6 +30,10 @@ forum = "https://github.com/yosupo06/library-checker-problems/issues/35"
     name = "path_graph_root_centroid.cpp"
     number = 3
 
+[[tests]]
+    name = "almost_line.cpp"
+    number = 2
+
 [[solutions]]
   name = "tle.cpp"
   expect = "TLE"