結果

問題 No.1817 Reversed Edges
ユーザー oteraotera
提出日時 2022-01-22 07:48:13
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 98 ms / 2,000 ms
コード長 6,549 bytes
コンパイル時間 2,342 ms
コンパイル使用メモリ 211,164 KB
実行使用メモリ 37,416 KB
最終ジャッジ日時 2023-08-17 20:54:06
合計ジャッジ時間 5,942 ms
ジャッジサーバーID
（参考情報） 		judge12 / judge13
このコードへのチャレンジ
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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
4,376 KB
testcase_01 AC 2 ms
4,376 KB
testcase_02 AC 1 ms
4,380 KB
testcase_03 AC 1 ms
4,380 KB
testcase_04 AC 2 ms
4,376 KB
testcase_05 AC 1 ms
4,380 KB
testcase_06 AC 1 ms
4,376 KB
testcase_07 AC 78 ms
9,832 KB
testcase_08 AC 31 ms
6,524 KB
testcase_09 AC 69 ms
9,624 KB
testcase_10 AC 32 ms
6,708 KB
testcase_11 AC 43 ms
7,904 KB
testcase_12 AC 79 ms
10,944 KB
testcase_13 AC 95 ms
10,688 KB
testcase_14 AC 98 ms
10,628 KB
testcase_15 AC 93 ms
10,876 KB
testcase_16 AC 91 ms
11,096 KB
testcase_17 AC 89 ms
10,636 KB
testcase_18 AC 96 ms
10,644 KB
testcase_19 AC 94 ms
11,000 KB
testcase_20 AC 97 ms
10,640 KB
testcase_21 AC 87 ms
10,892 KB
testcase_22 AC 40 ms
11,120 KB
testcase_23 AC 39 ms
11,240 KB
testcase_24 AC 71 ms
37,416 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

/**
 *    author:  otera
 *    created: 22.01.2022 07:37:32 
**/
#include<bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using uint = unsigned;
#define repa(i, n) for(int i = 0; i < n; ++ i)
#define repb(i, a, b) for(int i = a; i < b; ++ i)
#define repc(i, a, b, c) for(int i = a; i < b; i += c)
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, repc, repb, repa)(__VA_ARGS__)
#define rep1a(i, n) for(int i = 0; i <= n; ++ i)
#define rep1b(i, a, b) for(int i = a; i <= b; ++ i)
#define rep1c(i, a, b, c) for(int i = a; i <= b; i += c)
#define rep1(...) overload4(__VA_ARGS__, rep1c, rep1b, rep1a)(__VA_ARGS__)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define per1(i,n) for(int i=n;i>=1;i--)
typedef pair<int, int> P;
typedef pair<ll, ll> LP;
#define pb push_back
#define eb emplace_back
#define fr first
#define sc second
#define all(c) c.begin(),c.end()
#define lb(c, x) distance((c).begin(), lower_bound(all(c), (x)))
#define ub(c, x) distance((c).begin(), upper_bound(all(c), (x)))
#define Sort(a) sort(all(a))
#define Rev(a) reverse(all(a))
#define Uniq(a) sort(all(a));a.erase(unique(all(a)),end(a))
#define si(c) (int)(c).size()
inline ll popcnt(ull a){ return __builtin_popcountll(a); }
#define tpow(n) (1LL<<(n))
#define unless(A) if(!(A))
ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }
ll intpow(ll a, ll b, ll m) {ll ans = 1; while(b){ if(b & 1) (ans *= a) %= m; (a *= a) %= m; b /= 2; } return ans; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)
#define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__)
#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)
#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)
#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)
#define LD(...) ld __VA_ARGS__;in(__VA_ARGS__)
#define vec(type,name,...) vector<type>name(__VA_ARGS__)
#define VEC(type,name,size) vector<type>name(size);in(name)
#define vv(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))
#define VV(type,name,h,w) vector<vector<type>>name(h,vector<type>(w));in(name)
#define vvv(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))
template <class T> using vc = vector<T>;
template <class T> using vvc = vector<vc<T>>;
template <class T> using vvvc = vector<vvc<T>>;
template <class T> using vvvvc = vector<vvvc<T>>;
template <class T> using pq = priority_queue<T>;
template <class T> using pqg = priority_queue<T, vector<T>, greater<T>>;
template<class T> void scan(T& a){ cin >> a; }
template<class T> void scan(vector<T>& a){ for(auto&& i : a) scan(i); }
void in(){}
template <class Head, class... Tail> void in(Head& head, Tail&... tail){ scan(head); in(tail...); }
void print(){ cout << ' '; }
template<class T> void print(const T& a){ cout << a; }
template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ cout << ' '; print(*i); } }
int out(){ cout << '\n'; return 0; }
template<class T> int out(const T& t){ print(t); cout << '\n'; return 0; }
template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); cout << ' '; out(tail...); return 0; }
#define CHOOSE(a) CHOOSE2 a
#define CHOOSE2(a0,a1,a2,a3,a4,x,...) x
#define debug_1(x1) cout<<#x1<<": "<<x1<<endl
#define debug_2(x1,x2) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<endl
#define debug_3(x1,x2,x3) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<endl
#define debug_4(x1,x2,x3,x4) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<endl
#define debug_5(x1,x2,x3,x4,x5) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<", "#x5<<": "<<x5<<endl
#ifdef DEBUG
#define debug(...) CHOOSE((__VA_ARGS__,debug_5,debug_4,debug_3,debug_2,debug_1,~))(__VA_ARGS__)
#define dump(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); }
#else
#define debug(...)
#define dump(...)
#endif

template< typename U, typename T>
struct Rerooting {

    struct Edge {
        int to;
        U date;
        T dp;
    };

    using F1 = function< T(T, T) >;
    using F2 = function< T(T, U) >;

    vector<vector<Edge>> g;
    vector<T> dp, subdp;
    const T ident;
    const F1 f1;
    const F2 f2;

    Rerooting(int n, const F1 &f1, const F2 &f2, const T &ident) : g(n), f1(f1), f2(f2), ident(ident), dp(n, ident), subdp(n, ident) {}

    void add_edge(int s, int t, const U &d) {
        g[s].emplace_back((Edge) {t, d, ident});
        g[t].emplace_back((Edge) {s, d, ident});
    }

    void add_edge_bi(int s, int t, const U &d, const U &e) {
        g[s].emplace_back((Edge) {t, d, ident});
        g[t].emplace_back((Edge) {s, e, ident});
    }

    void rec(int v, int par) {
        for(auto &e: g[v]) {
            if(e.to == par) continue;
            rec(e.to, v);
            subdp[v] = f1(subdp[v], f2(subdp[e.to], e.date));
        }
    }

    void rerec(int v, int par, const T &pval) {
        int sz = (int)g[v].size();
        vector<T> left(sz + 1, ident), right(sz + 1, ident);
        for(int i = 0; i < sz; ++ i) {
            auto &e = g[v][i];
            e.dp = f2(par == e.to ? pval : subdp[e.to], e.date);
            left[i + 1] = f1(left[i], e.dp);
        }
        dp[v] = left[sz];
        for(int i = 0; i < sz; ++ i) {
            auto &e = g[v][sz - 1 - i];
            if(e.to != par) {
                rerec(e.to, v, f1(left[sz - 1 - i], right[i]));
            }
            right[i + 1] =  f1(right[i], e.dp);
        }
    }

    vector<T> build() {
        rec(0, -1);
        rerec(0, -1, ident);
        return dp;
    }
};

void solve() {
    INT(n);
    // vvc<int> g(n);
    auto f1 = [&](int a, int b) -> int {
        return a + b;
    };
    auto f2 = [&](int a, int x) -> int {
        return a + x;
    };
    Rerooting<int, int> rt(n, f1, f2, 0);
    rep(i, n - 1) {
        INT(a, b); -- a, -- b;
        rt.add_edge_bi(a, b, (a > b), (a < b));
        // g[a].eb(b);
        // g[b].eb(a);
    }
    for(int ans: rt.build()) {
        out(ans);
    }
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    // cout << fixed << setprecision(20);
    // INT(t); rep(i, t)solve();
    solve();
    return 0;
}
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