結果
問題 | No.2319 Friends+ |
ユーザー | hliuser1 |
提出日時 | 2023-12-25 16:41:57 |
言語 | C++17(clang) (17.0.6 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 1,993 bytes |
コンパイル時間 | 3,233 ms |
コンパイル使用メモリ | 167,020 KB |
実行使用メモリ | 72,064 KB |
最終ジャッジ日時 | 2024-09-27 14:29:46 |
合計ジャッジ時間 | 31,411 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 931 ms
72,064 KB |
testcase_03 | AC | 903 ms
71,936 KB |
testcase_04 | AC | 926 ms
71,936 KB |
testcase_05 | AC | 919 ms
72,064 KB |
testcase_06 | AC | 929 ms
72,064 KB |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | RE | - |
testcase_15 | RE | - |
testcase_16 | RE | - |
testcase_17 | AC | 2 ms
6,944 KB |
testcase_18 | AC | 643 ms
22,016 KB |
testcase_19 | AC | 671 ms
21,888 KB |
testcase_20 | RE | - |
testcase_21 | RE | - |
testcase_22 | RE | - |
testcase_23 | AC | 608 ms
21,888 KB |
testcase_24 | AC | 617 ms
21,760 KB |
testcase_25 | AC | 621 ms
21,760 KB |
testcase_26 | AC | 617 ms
21,760 KB |
testcase_27 | AC | 636 ms
21,888 KB |
testcase_28 | RE | - |
testcase_29 | RE | - |
testcase_30 | RE | - |
testcase_31 | RE | - |
testcase_32 | RE | - |
testcase_33 | RE | - |
testcase_34 | RE | - |
testcase_35 | RE | - |
testcase_36 | RE | - |
testcase_37 | AC | 746 ms
42,368 KB |
testcase_38 | RE | - |
testcase_39 | RE | - |
testcase_40 | RE | - |
testcase_41 | RE | - |
testcase_42 | RE | - |
testcase_43 | RE | - |
testcase_44 | RE | - |
testcase_45 | AC | 848 ms
41,728 KB |
testcase_46 | AC | 547 ms
37,632 KB |
ソースコード
#include <bits/stdc++.h> #pragma GCC optimize("O3") #pragma GCC target("sse4") using namespace std; using HashSet = unordered_set<int>; using FewCounter = unordered_map<int, vector<int>>; signed main() { int N, M, Q; cin >> N >> M; int K = sqrt(M); vector<int> world(N+1); // world[i] = the world that person i is in FewCounter num_few_of; // num_few_of[i].at(w) = # friends of i in world j with < K friends vector<int> many; // many = [those with >= K friends] vector<HashSet> friends(N+1); auto is_many = [&] (int i) { return friends[i].size() >= K; }; for (int i = 1; i <= N; ++i) cin >> world[i]; for (int i = 1; i <= M; ++i) { int a, b; cin >> a >> b; friends[a].insert(b); friends[b].insert(a); } for (int i = 1; i <= N; ++i) { if (!is_many(i)) continue; many.push_back(i); num_few_of[i].assign(N+1, 0); for (int f : friends[i]) if (!is_many(f)) { int w = world[f]; ++num_few_of[i].at(w); } } auto solve_many = [&] (int x, int y) { int new_world = world[y]; if (num_few_of[x].at(new_world) > 0) goto success; for (int m : many) if (friends[x].count(m) && world[m] == new_world) goto success; return "No\n"; success: world[x] = new_world; return "Yes\n"; }; auto solve_few = [&] (int x, int y) { for (int f : friends[x]) if (world[f] == world[y]) goto success; return "No\n"; success: int old_world = world[x]; int new_world = world[y]; for (int f : friends[x]) { if (is_many(f)) continue; --num_few_of[f].at(old_world); ++num_few_of[f].at(new_world); } world[x] = new_world; return "Yes\n"; }; cin >> Q; while (Q--) { int x, y; cin >> x >> y; if (world[x] == world[y]) { cout << "No\n"; continue; } auto ans = is_many(x) ? solve_many(x,y) : solve_few(x,y); cout << ans; } }