結果

問題 No.2301 Namorientation
ユーザー ktr216ktr216
提出日時 2023-05-12 23:17:43
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 872 ms / 3,000 ms
コード長 4,927 bytes
コンパイル時間 1,961 ms
コンパイル使用メモリ 195,672 KB
実行使用メモリ 98,112 KB
最終ジャッジ日時 2023-08-19 06:09:57
合計ジャッジ時間 22,029 ms
ジャッジサーバーID
(参考情報)
judge14 / judge11
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 2 ms
9,996 KB
testcase_01 AC 3 ms
9,988 KB
testcase_02 AC 4 ms
9,988 KB
testcase_03 AC 4 ms
10,204 KB
testcase_04 AC 3 ms
9,980 KB
testcase_05 AC 4 ms
10,004 KB
testcase_06 AC 4 ms
10,024 KB
testcase_07 AC 3 ms
10,196 KB
testcase_08 AC 3 ms
9,980 KB
testcase_09 AC 3 ms
10,060 KB
testcase_10 AC 3 ms
10,020 KB
testcase_11 AC 3 ms
10,032 KB
testcase_12 AC 440 ms
59,636 KB
testcase_13 AC 356 ms
55,180 KB
testcase_14 AC 851 ms
92,964 KB
testcase_15 AC 513 ms
65,452 KB
testcase_16 AC 672 ms
81,252 KB
testcase_17 AC 441 ms
61,780 KB
testcase_18 AC 716 ms
82,732 KB
testcase_19 AC 366 ms
52,360 KB
testcase_20 AC 712 ms
82,052 KB
testcase_21 AC 489 ms
64,432 KB
testcase_22 AC 293 ms
89,336 KB
testcase_23 AC 281 ms
88,008 KB
testcase_24 AC 236 ms
75,136 KB
testcase_25 AC 322 ms
77,556 KB
testcase_26 AC 424 ms
98,112 KB
testcase_27 AC 872 ms
93,412 KB
testcase_28 AC 871 ms
93,332 KB
testcase_29 AC 856 ms
93,284 KB
testcase_30 AC 871 ms
93,480 KB
testcase_31 AC 863 ms
93,564 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 #

#include <bits/stdc++.h>
using namespace std;

#define double long double

using ll = long long;
using VB = vector<bool>;
using VVB = vector<VB>;
using VVVB = vector<VVB>;
using VC = vector<char>;
using VVC = vector<VC>;
using VI = vector<int>;
using VVI = vector<VI>;
using VVVI = vector<VVI>;
using VVVVI = vector<VVVI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using VVVL = vector<VVL>;
using VVVVL = vector<VVVL>;
using VD = vector<double>;
using VVD = vector<VD>;
using VVVD = vector<VVD>;
//using P = pair<int, int>;

#define REP(i, n) for (ll i = 0; i < (int)(n); i++)
#define FOR(i, a, b) for (ll i = a; i < (ll)(b); i++)
#define ALL(a) (a).begin(),(a).end()

constexpr int INF = 1001001001;
constexpr ll LINF = 1001001001001001001ll;
constexpr int DX[] = {2, 1, -1, -2, -2, -1, 1, 2};
constexpr int DY[] = {1, 2, 2, 1, -1, -2, -2, -1};

template< typename T1, typename T2>
inline bool chmax(T1 &a, T2 b) {return a < b && (a = b, true); }
template< typename T1, typename T2>
inline bool chmin(T1 &a, T2 b) {return a > b && (a = b, true); }

const ll MOD = 998244353;

const int MAX_N = 400010;
int par[MAX_N];
int rnk[MAX_N];
int siz[MAX_N];

void init(int n) {
    REP(i,n) {
        par[i] = i;
        rnk[i] = 0;
        siz[i] = 1;
    }
}

int find(int x) {
    if (par[x] == x) {
        return x;
    } else {
        return par[x] = find(par[x]);
    }
}

void unite(int x, int y) {
    x = find(x);
    y = find(y);
    if (x == y) return;
    int s = siz[x] + siz[y];
    if (rnk[x] < rnk[y]) {
        par[x] = y;
    } else {
        par[y] = x;
        if (rnk[x] == rnk[y]) rnk[x]++;
    }
    siz[find(x)] = s;
}

bool same(int x, int y) {
    return find(x) == find(y);
}

int size(int x) {
    return siz[find(x)];
}

ll mod_pow(ll x, ll n, ll mod) {
    ll res = 1;
    x %= mod;
    while (n > 0) {
        if (n & 1) res = res * x % mod;
        x = x * x % mod;
        n >>= 1;
    }
    return res;
}

ll gcd(ll x, ll y) {
    if (y == 0) return x;
    return gcd(y, x % y);
}

typedef pair<ll, int> P0;
struct edge { int to; ll cost; };

const int MAX_V = 200000;
//const ll LINF = 1LL<<60;

int V;
vector<edge> G[MAX_V];
ll d[MAX_V];

void dijkstra(ll s) {
    priority_queue<P0, vector<P0>, greater<P0> > que;
    fill(d, d + V, LINF);
    d[s] = 0;
    que.push(P0(0, s));

    while (!que.empty()) {
        P0 p = que.top(); que.pop();
        int v = p.second;
        if (d[v] < p.first) continue;
        for (edge e : G[v]) {
            if (d[e.to] > d[v] + e.cost) {
                d[e.to] = d[v] + e.cost;
                que.push(P0(d[e.to], e.to));
            }
        }
    }
}

/*

double EPS = 1e-10;

double add(double a, double b) {
    if (abs(a + b) < EPS * (abs(a) + abs(b))) return 0;
    return a + b;
}

struct P {
    double x, y;
    P() {}
    P(double x, double y) : x(x), y(y) {
    }
    P operator + (P p) {
        return P(add(x, p.x), add(y, p.y));
    }
    P operator - (P p) {
        return P(add(x, -p.x), add(y, -p.y));
    }
    P operator * (double d) {
        return P(x * d, y * d);
    }
    double dot(P p) {
        return add(x * p.x, y * p.y);
    }
    double det(P p) {
        return add(x * p.y, -y * p.x);
    }
};

bool on_seg(P p1, P p2, P q) {
    return ()
}

P intersection(P p1, P p2, P q1, P q2) {
    return p1 + (p2 - p1) * ((q2 - q1).det(q1 - p1) / (q2 - q1).det(p2 - p1));
}

*/

/*

VL f(500001, 1);

ll C(ll n, ll k) {
    return f[n] * mod_pow(f[k], MOD - 2, MOD) % MOD * mod_pow(f[n - k], MOD - 2, MOD) % MOD;
}

ll P(ll n, ll k) {
    return f[n] * mod_pow(f[n - k], MOD - 2, MOD) % MOD;
}

*/

int main() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    //REP(i, 500000) f[i + 1] = f[i] * (i + 1) % MOD;
    int N;
    cin >> N;
    VI A(N), B(N);
    map<VI, int> mp;
    vector<set<int>> E(N);
    REP(i, N) {
        cin >> A[i] >> B[i];
        A[i]--;
        B[i]--;
        mp[{A[i], B[i]}] = i;
        mp[{B[i], A[i]}] = i;
        E[A[i]].insert(B[i]);
        E[B[i]].insert(A[i]);
    }
    set<int> st;
    REP(i, N) if (E[i].size() == 1) st.insert(i);
    vector<string> ans(N, "?\n");
    while (!st.empty()) {
        int u = *st.begin();
        st.erase(st.begin());
        int v = *E[u].begin();
        E[u].erase(v);
        E[v].erase(u);
        if (E[v].size() == 1) st.insert(v);
        int i = mp[{u, v}];
        if (A[i] == u) ans[i] = "->\n";
        else ans[i] = "<-\n";
        //cout << i << ans[i];
    }
    int u;
    REP(i, N) {
        if (E[i].size() > 0) u = i;
    }
    //cout << "u=" << u << endl;
    int x = u, v = *E[u].begin();
    E[v].erase(u);
    while (true) {
        //cout << "u, v =" << u << " " << v << endl;
        int i = mp[{u, v}];
        if (A[i] == u) ans[i] = "->\n";
        else ans[i] = "<-\n";
        u = v;
        v = *E[u].begin();
        E[v].erase(u);
        if (u == x) break;
    }
    REP(i, N) cout << ans[i];
}
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