結果
問題 | No.1254 補強への架け橋 |
ユーザー | 沙耶花 |
提出日時 | 2020-10-09 21:55:11 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 114 ms / 2,000 ms |
コード長 | 3,074 bytes |
コンパイル時間 | 2,529 ms |
コンパイル使用メモリ | 213,640 KB |
実行使用メモリ | 16,124 KB |
最終ジャッジ日時 | 2024-07-20 10:59:53 |
合計ジャッジ時間 | 12,619 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 1 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 1 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 1 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | AC | 2 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
testcase_30 | AC | 2 ms
5,376 KB |
testcase_31 | AC | 1 ms
5,376 KB |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | AC | 2 ms
5,376 KB |
testcase_34 | AC | 2 ms
5,376 KB |
testcase_35 | AC | 1 ms
5,376 KB |
testcase_36 | AC | 2 ms
5,376 KB |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 1 ms
5,376 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 1 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | AC | 2 ms
5,376 KB |
testcase_45 | AC | 2 ms
5,376 KB |
testcase_46 | AC | 2 ms
5,376 KB |
testcase_47 | AC | 2 ms
5,376 KB |
testcase_48 | AC | 2 ms
5,376 KB |
testcase_49 | AC | 1 ms
5,376 KB |
testcase_50 | AC | 2 ms
5,376 KB |
testcase_51 | AC | 2 ms
5,376 KB |
testcase_52 | AC | 3 ms
5,376 KB |
testcase_53 | AC | 2 ms
5,376 KB |
testcase_54 | AC | 3 ms
5,376 KB |
testcase_55 | AC | 2 ms
5,376 KB |
testcase_56 | AC | 2 ms
5,376 KB |
testcase_57 | AC | 3 ms
5,376 KB |
testcase_58 | AC | 2 ms
5,376 KB |
testcase_59 | AC | 2 ms
5,376 KB |
testcase_60 | AC | 2 ms
5,376 KB |
testcase_61 | AC | 2 ms
5,376 KB |
testcase_62 | AC | 2 ms
5,376 KB |
testcase_63 | AC | 10 ms
5,376 KB |
testcase_64 | AC | 4 ms
5,376 KB |
testcase_65 | AC | 6 ms
5,376 KB |
testcase_66 | AC | 6 ms
5,376 KB |
testcase_67 | AC | 4 ms
5,376 KB |
testcase_68 | AC | 6 ms
5,376 KB |
testcase_69 | AC | 8 ms
5,376 KB |
testcase_70 | AC | 4 ms
5,376 KB |
testcase_71 | AC | 4 ms
5,376 KB |
testcase_72 | AC | 8 ms
5,376 KB |
testcase_73 | AC | 4 ms
5,376 KB |
testcase_74 | AC | 8 ms
5,376 KB |
testcase_75 | AC | 7 ms
5,376 KB |
testcase_76 | AC | 3 ms
5,376 KB |
testcase_77 | AC | 6 ms
5,376 KB |
testcase_78 | AC | 9 ms
5,376 KB |
testcase_79 | AC | 9 ms
5,376 KB |
testcase_80 | AC | 10 ms
5,376 KB |
testcase_81 | AC | 9 ms
5,376 KB |
testcase_82 | AC | 8 ms
5,376 KB |
testcase_83 | AC | 92 ms
15,540 KB |
testcase_84 | AC | 85 ms
15,128 KB |
testcase_85 | AC | 52 ms
10,728 KB |
testcase_86 | AC | 73 ms
13,512 KB |
testcase_87 | AC | 98 ms
14,456 KB |
testcase_88 | AC | 13 ms
5,376 KB |
testcase_89 | AC | 88 ms
15,332 KB |
testcase_90 | AC | 57 ms
11,044 KB |
testcase_91 | AC | 45 ms
9,516 KB |
testcase_92 | AC | 25 ms
6,500 KB |
testcase_93 | AC | 70 ms
13,084 KB |
testcase_94 | AC | 65 ms
12,112 KB |
testcase_95 | AC | 63 ms
12,080 KB |
testcase_96 | AC | 86 ms
14,728 KB |
testcase_97 | AC | 37 ms
8,532 KB |
testcase_98 | AC | 83 ms
14,948 KB |
testcase_99 | AC | 53 ms
10,372 KB |
testcase_100 | AC | 91 ms
15,728 KB |
testcase_101 | AC | 23 ms
6,156 KB |
testcase_102 | AC | 12 ms
5,376 KB |
testcase_103 | AC | 24 ms
6,528 KB |
testcase_104 | AC | 32 ms
7,752 KB |
testcase_105 | AC | 73 ms
12,964 KB |
testcase_106 | AC | 41 ms
9,048 KB |
testcase_107 | AC | 88 ms
15,340 KB |
testcase_108 | AC | 91 ms
15,208 KB |
testcase_109 | AC | 72 ms
12,868 KB |
testcase_110 | AC | 64 ms
12,020 KB |
testcase_111 | AC | 68 ms
12,636 KB |
testcase_112 | AC | 35 ms
7,556 KB |
testcase_113 | AC | 61 ms
11,692 KB |
testcase_114 | AC | 41 ms
8,888 KB |
testcase_115 | AC | 15 ms
5,376 KB |
testcase_116 | AC | 49 ms
9,724 KB |
testcase_117 | AC | 30 ms
7,588 KB |
testcase_118 | AC | 84 ms
14,784 KB |
testcase_119 | AC | 50 ms
10,288 KB |
testcase_120 | AC | 85 ms
14,368 KB |
testcase_121 | AC | 31 ms
6,952 KB |
testcase_122 | AC | 45 ms
9,624 KB |
testcase_123 | AC | 2 ms
5,376 KB |
testcase_124 | AC | 107 ms
16,124 KB |
testcase_125 | AC | 114 ms
16,124 KB |
コンパイルメッセージ
main.cpp: In function 'int main()': main.cpp:132:17: warning: 'z' may be used uninitialized [-Wmaybe-uninitialized] 132 | if(i==z)ans.push_back(i); | ^~ main.cpp:108:13: note: 'z' was declared here 108 | int z; | ^ main.cpp:129:20: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized] 129 | int d = a[y]; | ^ main.cpp:107:15: note: 'y' was declared here 107 | int x,y; | ^ main.cpp:127:32: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized] 127 | vector<int> a = get(x,E),b = get(y,E); | ^ main.cpp:107:13: note: 'x' was declared here 107 | int x,y; | ^
ソースコード
#include <stdio.h> #include <bits/stdc++.h> #include <algorithm> #include <cassert> #include <vector> namespace atcoder { // Implement (union by size) + (path compression) // Reference: // Zvi Galil and Giuseppe F. Italiano, // Data structures and algorithms for disjoint set union problems struct dsu { public: dsu() : _n(0) {} dsu(int n) : _n(n), parent_or_size(n, -1) {} int merge(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); int x = leader(a), y = leader(b); if (x == y) return x; if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y); parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; return parent_or_size[a] = leader(parent_or_size[a]); } int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } std::vector<std::vector<int>> groups() { std::vector<int> leader_buf(_n), group_size(_n); for (int i = 0; i < _n; i++) { leader_buf[i] = leader(i); group_size[leader_buf[i]]++; } std::vector<std::vector<int>> result(_n); for (int i = 0; i < _n; i++) { result[i].reserve(group_size[i]); } for (int i = 0; i < _n; i++) { result[leader_buf[i]].push_back(i); } result.erase( std::remove_if(result.begin(), result.end(), [&](const std::vector<int>& v) { return v.empty(); }), result.end()); return result; } private: int _n; // root node: -1 * component size // otherwise: parent std::vector<int> parent_or_size; }; } // namespace atcoder using namespace atcoder; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 2000000001 vector<int> get(int x,vector<vector<int>> E){ vector<int> ret(E.size(),Inf); ret[x] = 0; queue<int> Q; Q.push(x); while(Q.size()!=0){ int u = Q.front(); Q.pop(); rep(i,E[u].size()){ int v = E[u][i]; if(ret[v]!=Inf)continue; ret[v] = ret[u]+1; Q.push(v); } } return ret; } int main(){ int n; cin>>n; dsu D(n); vector<int> u(n),v(n); int x,y; int z; vector<vector<int>> E(n,vector<int>()); rep(i,n){ cin>>u[i]>>v[i]; u[i]--; v[i]--; if(D.same(u[i],v[i])){ x = u[i]; y = v[i]; z = i; } else{ D.merge(u[i],v[i]); E[u[i]].push_back(v[i]); E[v[i]].push_back(u[i]); } } vector<int> a = get(x,E),b = get(y,E); int d = a[y]; vector<int> ans; rep(i,n){ if(i==z)ans.push_back(i); else{ if(a[u[i]]+b[v[i]]+1==d || b[u[i]]+a[v[i]]+1==d)ans.push_back(i); } } cout<<ans.size()<<endl; rep(i,ans.size()){ if(i!=0)cout<<' '; cout<<ans[i]+1; } cout<<endl; return 0; }