結果
問題 | No.1817 Reversed Edges |
ユーザー | Sumitacchan |
提出日時 | 2022-01-21 21:37:57 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 176 ms / 2,000 ms |
コード長 | 3,396 bytes |
コンパイル時間 | 2,107 ms |
コンパイル使用メモリ | 212,268 KB |
実行使用メモリ | 16,256 KB |
最終ジャッジ日時 | 2024-05-04 12:13:41 |
合計ジャッジ時間 | 6,188 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 1 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 142 ms
11,776 KB |
testcase_08 | AC | 69 ms
7,424 KB |
testcase_09 | AC | 136 ms
11,264 KB |
testcase_10 | AC | 77 ms
7,936 KB |
testcase_11 | AC | 102 ms
9,216 KB |
testcase_12 | AC | 164 ms
12,928 KB |
testcase_13 | AC | 169 ms
12,928 KB |
testcase_14 | AC | 164 ms
12,928 KB |
testcase_15 | AC | 166 ms
12,928 KB |
testcase_16 | AC | 173 ms
12,928 KB |
testcase_17 | AC | 161 ms
12,928 KB |
testcase_18 | AC | 161 ms
12,928 KB |
testcase_19 | AC | 163 ms
12,928 KB |
testcase_20 | AC | 168 ms
12,928 KB |
testcase_21 | AC | 176 ms
12,800 KB |
testcase_22 | AC | 141 ms
11,940 KB |
testcase_23 | AC | 144 ms
11,808 KB |
testcase_24 | AC | 147 ms
16,256 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; //using namespace atcoder; struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define FOR(i, begin, end) for(int i=(begin);i<(end);i++) #define REP(i, n) FOR(i,0,n) #define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--) #define IREP(i, n) IFOR(i,0,n) #define Sort(v) sort(v.begin(), v.end()) #define Reverse(v) reverse(v.begin(), v.end()) #define all(v) v.begin(),v.end() #define SZ(v) ((int)v.size()) #define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x)) #define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x)) #define chmax(a, b) a = max(a, b) #define chmin(a, b) a = min(a, b) #define bit(n) (1LL<<(n)) #define debug(x) cout << #x << "=" << x << endl; #define vdebug(v) { cout << #v << "=" << endl; REP(i_debug, (int)v.size()){ cout << v[i_debug] << ","; } cout << endl; } #define mdebug(m) { cout << #m << "=" << endl; REP(i_debug, (int)m.size()){ REP(j_debug, (int)m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;} } #define pb push_back #define fi first #define se second #define int long long #define INF 1000000000000000000 template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < (int)v.size(); i++) { cout << v[i]; if(i != (int)v.size() - 1) cout << endl; }; return os; } template<typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p){ cout << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T> void Out(T x) { cout << x << endl; } template<typename T1, typename T2> void chOut(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); } using vec = vector<int>; using mat = vector<vec>; using Pii = pair<int, int>; using v_bool = vector<bool>; using v_Pii = vector<Pii>; //int dx[4] = {1,0,-1,0}; //int dy[4] = {0,1,0,-1}; //char d[4] = {'D','R','U','L'}; //const int mod = 1000000007; const int mod = 998244353; template<typename T> struct edge{ int to; T cost; int id; }; template<typename T = long long> struct Graph { int N; vector<vector<edge<T>>> E; vec ans; Graph(int N): N(N){ E = vector<vector<edge<T>>>(N, vector<edge<T>>(0)); ans.resize(N); } void add_Directed_edge(int from, int to, T cost = 1, int id = 0){ E[from].push_back(edge<T>({ to, cost, id })); } void add_Undirected_edge(int v1, int v2, T cost = 1, int id = 0){ add_Directed_edge(v1, v2, cost, id); add_Directed_edge(v2, v1, cost, id); } int dfs1(int v, int p = -1){ int x = 0; for(auto e: E[v]) if(e.to != p){ x += dfs1(e.to, v); if(v > e.to) x++; } if(p == -1) ans[v] = x; return x; } void dfs2(int v, int p = -1){ if(p != -1){ ans[v] = ans[p]; if(v > p) ans[v] += 1; else ans[v] -= 1; } for(auto e: E[v]) if(e.to != p){ dfs2(e.to, v); } } }; signed main(){ int N; cin >> N; Graph G(N); REP(i, N - 1){ int a, b; cin >> a >> b; a--; b--; G.add_Undirected_edge(a, b); } G.dfs1(0); G.dfs2(0); cout << G.ans << endl; return 0; }