結果
問題 | No.2677 Minmax Independent Set |
ユーザー | じなぺ |
提出日時 | 2024-03-20 12:38:42 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 109 ms / 2,000 ms |
コード長 | 5,005 bytes |
コンパイル時間 | 2,932 ms |
コンパイル使用メモリ | 259,836 KB |
実行使用メモリ | 53,956 KB |
最終ジャッジ日時 | 2024-09-30 06:03:19 |
合計ジャッジ時間 | 8,024 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 1 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 2 ms
6,820 KB |
testcase_05 | AC | 85 ms
17,984 KB |
testcase_06 | AC | 83 ms
18,368 KB |
testcase_07 | AC | 82 ms
18,756 KB |
testcase_08 | AC | 86 ms
19,776 KB |
testcase_09 | AC | 85 ms
21,700 KB |
testcase_10 | AC | 60 ms
14,828 KB |
testcase_11 | AC | 59 ms
14,916 KB |
testcase_12 | AC | 91 ms
53,956 KB |
testcase_13 | AC | 89 ms
27,968 KB |
testcase_14 | AC | 80 ms
27,968 KB |
testcase_15 | AC | 95 ms
36,164 KB |
testcase_16 | AC | 78 ms
14,896 KB |
testcase_17 | AC | 79 ms
14,964 KB |
testcase_18 | AC | 48 ms
10,752 KB |
testcase_19 | AC | 57 ms
12,032 KB |
testcase_20 | AC | 21 ms
6,820 KB |
testcase_21 | AC | 64 ms
13,092 KB |
testcase_22 | AC | 6 ms
6,816 KB |
testcase_23 | AC | 2 ms
6,816 KB |
testcase_24 | AC | 2 ms
6,816 KB |
testcase_25 | AC | 2 ms
6,820 KB |
testcase_26 | AC | 2 ms
6,820 KB |
testcase_27 | AC | 2 ms
6,816 KB |
testcase_28 | AC | 61 ms
14,800 KB |
testcase_29 | AC | 109 ms
39,100 KB |
testcase_30 | AC | 2 ms
6,820 KB |
testcase_31 | AC | 2 ms
6,820 KB |
testcase_32 | AC | 2 ms
6,820 KB |
testcase_33 | AC | 2 ms
6,820 KB |
testcase_34 | AC | 2 ms
6,816 KB |
testcase_35 | AC | 2 ms
6,816 KB |
testcase_36 | AC | 2 ms
6,816 KB |
testcase_37 | AC | 1 ms
6,816 KB |
testcase_38 | AC | 2 ms
6,820 KB |
testcase_39 | AC | 2 ms
6,820 KB |
testcase_40 | AC | 3 ms
6,816 KB |
testcase_41 | AC | 3 ms
6,816 KB |
testcase_42 | AC | 5 ms
6,816 KB |
testcase_43 | AC | 9 ms
6,820 KB |
testcase_44 | AC | 19 ms
6,820 KB |
testcase_45 | AC | 36 ms
8,960 KB |
testcase_46 | AC | 81 ms
14,732 KB |
testcase_47 | AC | 79 ms
14,864 KB |
testcase_48 | AC | 79 ms
14,980 KB |
testcase_49 | AC | 83 ms
14,800 KB |
testcase_50 | AC | 24 ms
7,672 KB |
testcase_51 | AC | 4 ms
6,816 KB |
testcase_52 | AC | 51 ms
12,952 KB |
testcase_53 | AC | 47 ms
12,220 KB |
testcase_54 | AC | 3 ms
6,816 KB |
testcase_55 | AC | 64 ms
14,908 KB |
testcase_56 | AC | 66 ms
14,828 KB |
testcase_57 | AC | 66 ms
14,936 KB |
testcase_58 | AC | 62 ms
14,780 KB |
testcase_59 | AC | 60 ms
14,796 KB |
testcase_60 | AC | 56 ms
14,800 KB |
testcase_61 | AC | 54 ms
14,904 KB |
testcase_62 | AC | 64 ms
21,952 KB |
testcase_63 | AC | 73 ms
34,240 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; //#include <atcoder/all> //using namespace atcoder; //using mint = modint998244353; //多倍長整数// //#include <boost/multiprecision/cpp_int.hpp> //namespace mp = boost::multiprecision; //using Bint = mp::cpp_int; const int INF = 1e9; const int MOD = 998244353; const long long LINF = 4e18; using ll = long long; using vi = vector<int>; using vl = vector<long long>; using vs = vector<string>; using vc = vector<char>; using vb = vector<bool>; using vvi = vector<vector<int>>; using vvvi = vector<vector<vector<int>>>; using vvvvi = vector<vector<vector<vector<int>>>>; using vvl = vector<vector<long long>>; using vvvl = vector<vector<vector<long long>>>; using vvvvl = vector<vector<vector<vector<long long>>>>; using vvc = vector<vector<char>>; using vvb = vector<vector<bool>>; using vvvb = vector<vector<vector<bool>>>; using vvvvb = vector<vector<vector<vector<bool>>>>; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define dump(x) cout << #x << " = " << (x) << endl; #define Yes(n) cout << ((n) ? "Yes" : "No" ) << endl #define ALL(obj) (obj).begin(),(obj).end() //https://trap.jp/post/1702/ template <class E, class V, E (*merge)(E, E), E (*e)(), E (*put_edge)(V, int), V (*put_vertex)(E, int)> struct RerootingDP { struct edge { int to, idx, xdi; }; RerootingDP(int n_ = 0) : n(n_), inner_edge_id(0) { es.resize(2*n-2); start.resize(2*n-2); if (n == 1) es_build(); } void add_edge(int u, int v, int idx, int xdi){ start[inner_edge_id] = u; es[inner_edge_id] = {v,idx,xdi}; inner_edge_id++; start[inner_edge_id] = v; es[inner_edge_id] = {u,xdi,idx}; inner_edge_id++; if (inner_edge_id == 2*n-2){ es_build(); } } vector<V> build(int root_ = 0){ root = root_; vector<V> subdp(n); subdp[0] = put_vertex(e(),0); outs.resize(n); vector<int> geta(n+1,0); for (int i = 0; i < n; i++) geta[i+1] = start[i+1] - start[i] - 1; geta[root+1]++; for (int i = 0; i < n; i++) geta[i+1] += geta[i]; auto dfs = [&](auto sfs, int v, int f) -> void { E val = e(); for (int i = start[v]; i < start[v+1]; i++){ if (es[i].to == f){ swap(es[start[v+1]-1],es[i]); } if (es[i].to == f) continue; sfs(sfs,es[i].to,v); E nval = put_edge(subdp[es[i].to],es[i].idx); outs[geta[v]++] = nval; val = merge(val,nval); } subdp[v] = put_vertex(val, v); }; dfs(dfs,root,-1); return subdp; } vector<V> reroot(){ vector<E> reverse_edge(n); reverse_edge[root] = e(); vector<V> answers(n); auto dfs = [&](auto sfs, int v) -> void { int le = outs_start(v); int ri = outs_start(v+1); int siz = ri - le; vector<E> rui(siz+1); rui[siz] = e(); for (int i = siz-1; i >= 0; i--){ rui[i] = merge(outs[le+i],rui[i+1]); } answers[v] = put_vertex(merge(rui[0],reverse_edge[v]),v); E lui = e(); for (int i = 0; i < siz; i++){ V rdp = put_vertex(merge(merge(lui,rui[i+1]),reverse_edge[v]),v); reverse_edge[es[start[v]+i].to] = put_edge(rdp,es[start[v]+i].xdi); lui = merge(lui,outs[le+i]); sfs(sfs,es[start[v]+i].to); } }; dfs(dfs,root); return answers; } private: int n, root, inner_edge_id; vector<E> outs; vector<edge> es; vector<int> start; int outs_start(int v){ int res = start[v] - v; if (root < v) res++; return res; } void es_build(){ vector<edge> nes(2*n-2); vector<int> nstart(n+2,0); for (int i = 0; i < 2*n-2; i++) nstart[start[i]+2]++; for (int i = 0; i < n; i++) nstart[i+1] += nstart[i]; for (int i = 0; i < 2*n-2; i++) nes[nstart[start[i]+1]++] = es[i]; swap(es,nes); swap(start,nstart); } }; pair<int,int> merge(pair<int,int> a,pair<int,int> b){ return {a.first + b.first,a.second + b.second}; } pair<int,int> e(){ return make_pair(0,0); } pair<int,int> put_e(pair<int,int> x,int i){ return {x.first,max(x.first,x.second)}; } pair<int,int> put_v(pair<int,int> x,int i){ return {x.second,x.first + 1}; } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int n; cin >> n; RerootingDP<pair<int,int>, pair<int,int>,merge, e,put_e,put_v> dp(n); rep(i,n - 1){ int a,b; cin >> a >> b; a--;b--; dp.add_edge(a,b,i,i + n); } int ans = INF; dp.build(); auto ret = dp.reroot(); // cout << endl; // rep(i,n) cout << ret[i].first << ' ' << ret[i].second << endl; rep(i,n){ ans = min(ans,ret[i].second); } cout << ans << endl; return 0; }