結果
問題 | No.277 根掘り葉掘り |
ユーザー | miyo2580 |
提出日時 | 2023-12-04 21:21:41 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 136 ms / 3,000 ms |
コード長 | 5,132 bytes |
コンパイル時間 | 2,950 ms |
コンパイル使用メモリ | 178,772 KB |
実行使用メモリ | 43,136 KB |
最終ジャッジ日時 | 2024-09-26 23:14:06 |
合計ジャッジ時間 | 4,229 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 2 ms
5,376 KB |
testcase_03 | AC | 2 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 | 2 ms
5,376 KB |
testcase_09 | AC | 136 ms
43,136 KB |
testcase_10 | AC | 62 ms
13,028 KB |
testcase_11 | AC | 76 ms
11,008 KB |
testcase_12 | AC | 116 ms
26,624 KB |
testcase_13 | AC | 90 ms
11,264 KB |
testcase_14 | AC | 81 ms
12,672 KB |
testcase_15 | AC | 87 ms
14,208 KB |
testcase_16 | AC | 91 ms
12,544 KB |
testcase_17 | AC | 86 ms
12,288 KB |
testcase_18 | AC | 80 ms
12,032 KB |
testcase_19 | AC | 86 ms
11,776 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define repd(i,a,b) for (ll i=(a);i<(b);i++) #define rep(i,n) repd(i,0,n) #define all(x) (x).begin(),(x).end() template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } typedef long long ll; typedef pair<ll,ll> P; typedef vector<ll> vec; using Graph = vector<vector<ll>>; const long long INF = 1LL<<60; const long long MOD = 1000000007; //https://nyaannyaan.github.io/library/graph/graph-template.hpp template <typename T> struct edge { int src, to; T cost; edge(int _to, T _cost) : src(-1), to(_to), cost(_cost) {} edge(int _src, int _to, T _cost) : src(_src), to(_to), cost(_cost) {} edge &operator=(const int &x) { to = x; return *this; } operator int() const { return to; } }; template <typename T> using Edges = vector<edge<T>>; template <typename T> using WeightedGraph = vector<Edges<T>>; using UnweightedGraph = vector<vector<int>>; // Input of (Unweighted) Graph UnweightedGraph graph(int N, int M = -1, bool is_directed = false, bool is_1origin = true) { UnweightedGraph g(N); if (M == -1) M = N - 1; for (int _ = 0; _ < M; _++) { int x, y; cin >> x >> y; if (is_1origin) x--, y--; g[x].push_back(y); if (!is_directed) g[y].push_back(x); } return g; } // Input of Weighted Graph template <typename T> WeightedGraph<T> wgraph(int N, int M = -1, bool is_directed = false, bool is_1origin = true) { WeightedGraph<T> g(N); if (M == -1) M = N - 1; for (int _ = 0; _ < M; _++) { int x, y; cin >> x >> y; T c; cin >> c; if (is_1origin) x--, y--; g[x].emplace_back(x, y, c); if (!is_directed) g[y].emplace_back(y, x, c); } return g; } // Input of Edges template <typename T> Edges<T> esgraph(int N, int M, int is_weighted = true, bool is_1origin = true) { Edges<T> es; for (int _ = 0; _ < M; _++) { int x, y; cin >> x >> y; T c; if (is_weighted) cin >> c; else c = 1; if (is_1origin) x--, y--; es.emplace_back(x, y, c); } return es; } // Input of Adjacency Matrix template <typename T> vector<vector<T>> adjgraph(int N, int M, T INF, int is_weighted = true, bool is_directed = false, bool is_1origin = true) { vector<vector<T>> d(N, vector<T>(N, INF)); for (int _ = 0; _ < M; _++) { int x, y; cin >> x >> y; T c; if (is_weighted) cin >> c; else c = 1; if (is_1origin) x--, y--; d[x][y] = c; if (!is_directed) d[y][x] = c; } return d; } /** * @brief グラフテンプレート * @docs docs/graph/graph-template.md */ //https://nyaannyaan.github.io/library/tree/rerooting.hpp // Rerooting // f1(c1, c2) ... merge value of child node // f2(memo[i], chd, par) ... return value from child node to parent node // memo[i] ... result of subtree rooted i // dp[i] ... result of tree rooted i template <typename T, typename G, typename F1, typename F2> struct Rerooting { const G &g; const F1 f1; const F2 f2; vector<T> memo, dp; T I; Rerooting(const G &_g, const F1 _f1, const F2 _f2, const T &I_) : g(_g), f1(_f1), f2(_f2), memo(g.size(), I_), dp(g.size(), I_), I(I_) { dfs(0, -1); efs(0, -1, I); } const T &operator[](int i) const { return dp[i]; } void dfs(int cur, int par) { for (auto &dst : g[cur]) { if (dst == par) continue; dfs(dst, cur); memo[cur] = f1(memo[cur], f2(memo[dst], dst, cur)); } } void efs(int cur, int par, const T &pval) { // get cumulative sum vector<T> buf; for (auto dst : g[cur]) { if (dst == par) continue; buf.push_back(f2(memo[dst], dst, cur)); } vector<T> head(buf.size() + 1), tail(buf.size() + 1); head[0] = tail[buf.size()] = I; for (int i = 0; i < (int)buf.size(); i++) head[i + 1] = f1(head[i], buf[i]); for (int i = (int)buf.size() - 1; i >= 0; i--) tail[i] = f1(tail[i + 1], buf[i]); // update dp[cur] = par == -1 ? head.back() : f1(pval, head.back()); // propagate int idx = 0; for (auto &dst : g[cur]) { if (dst == par) continue; efs(dst, cur, f2(f1(pval, f1(head[idx], tail[idx + 1])), cur, dst)); idx++; } } }; /** * @brief Rerooting(全方位木DP) * @docs docs/tree/rerooting.md */ int main() { ios::sync_with_stdio(false); cin.tie(0); ll n;cin>>n; auto g=graph(n,n-1,0,1); auto f1=[&](ll x,ll y){ return min(x,y); }; auto f2=[&](ll x,ll chd,ll p){ if(g[chd].size()==1)x=0; if(g[p].size()==1)x=-1; return x+1; }; Rerooting<ll,decltype(g),decltype(f1),decltype(f2)> dp(g,f1,f2,INF); vec ans(n); function<void(ll,ll,ll)> dfs=[&](ll x,ll p,ll d){ for(ll nx:g[x]){ if(nx==p)continue; dfs(nx,x,d+1); } ans[x]=d; }; dfs(0,-1,0); ll id=0; for(ll i:dp.dp){ chmin(ans[id],i); id++; } rep(i,n)cout<<ans[i]<<'\n'; return 0; }