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답안 #567484

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
567484 2022-05-23T15:10:52 Z maomao90 Jail (JOI22_jail) C++17
5 / 100
 2179 ms 641024 KB 
// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 200005;
const int MAXL = 20;

int q;
int n, m;
vi adj[MAXN], radj[MAXN * 80];
int s[MAXN], t[MAXN];
int mps[MAXN], mpt[MAXN];

int p[MAXL][MAXN], id[MAXL][MAXN], ptr;
int lvl[MAXN];
void dfs(int u, int cp) {
    p[0][u] = cp;
    cerr << u << '\n';
    REP (k, 1, MAXL) {
        if (p[k - 1][u] == -1) {
            p[k][u] = -1;
            id[k][u] = -1;
        } else {
            cerr << ' ' << k << '\n';
            p[k][u] = p[k - 1][p[k - 1][u]];
            id[k][u] = ptr;
            radj[id[k - 1][u]].pb(id[k][u]);
            radj[id[k][u] ^ 1].pb(id[k - 1][u] ^ 1);
            cerr << id[k - 1][u] << " -> " << id[k][u] << '\n';
            cerr << (id[k][u] ^ 1) << " -> " << (id[k - 1][u] ^ 1) << '\n';
            if (id[k - 1][p[k - 1][u]] != -1) {
                radj[id[k - 1][p[k - 1][u]]].pb(id[k][u]);
                radj[id[k][u] ^ 1].pb(id[k - 1][p[k - 1][u]] ^ 1);
                cerr << id[k - 1][p[k - 1][u]] << " -> " << id[k][u] << '\n';
                cerr << (id[k][u] ^ 1) << " -> " << (id[k - 1][p[k - 1][u]] ^ 1) << '\n';
            }
            ptr += 2;
        }
    }
    for (int v : adj[u]) {
        if (v == cp) continue;
        lvl[v] = lvl[u] + 1;
        dfs(v, u);
    }
}

int vis[MAXN * 80];
bool cyc;
void rdfs(int u) {
    vis[u] = 1;
    for (int v : radj[u]) {
        if (vis[v] == 1) {
            cyc = 1;
        } else if (!vis[v]) {
            rdfs(v);
        }
    }
    vis[u] = 2;
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> q;
    while (q--) {
        cin >> n;
        REP (i, 0, n + 1) {
            adj[i].clear();
            mps[i] = 0, mpt[i] = 0;
            REP (j, 0, MAXL) {
                id[j][i] = -1;
                p[j][i] = -1;
            }
        }
        REP (i, 1, n) {
            int a, b; cin >> a >> b;
            adj[a].pb(b);
            adj[b].pb(a);
        }
        cin >> m;
        ptr = m;
        if (ptr & 1) {
            ptr++;
        }
        REP (i, 1, n + 1) {
            id[0][i] = ptr;
            ptr += 2;
        }
        REP (i, 0, m) {
            cin >> s[i] >> t[i];
            mps[s[i]] = i, mpt[t[i]] = i;
            radj[i].pb(id[0][s[i]]);
            radj[id[0][t[i]] ^ 1].pb(i);
            cerr << i << " -> " << id[0][s[i]] << '\n';
            cerr << (id[0][t[i]] ^ 1) << " -> " << i << '\n';
        }
        dfs(1, -1);
        REP (i, 0, m) {
            int u = s[i], v = t[i];
            if (mpt[u] != 0) {
                radj[i].pb(mpt[u]);
                cerr << i << " -> " << mpt[u] << '\n';
            }
            if (mps[v] != 0) {
                radj[mps[v]].pb(i);
                cerr << mps[v] << " -> " << i << '\n';
            }
            if (lvl[u] < lvl[v]) {
                swap(u, v);
            }
            auto jump = [&] (int &u, int k) {
                radj[id[k][u]].pb(i);
                radj[i].pb(id[k][u] ^ 1);
                cerr << id[k][u] << " -> " << i << '\n';
                cerr << i << " -> " << (id[k][u] ^ 1) << '\n';
                u = p[k][u];
            };
            u = p[0][u];
            RREP (k, MAXL - 1, 0) {
                if (p[k][u] == -1) continue;
                if (lvl[p[k][u]] >= lvl[v]) {
                    jump(u, k);
                }
            }
            bool hasj = 0;
            if (lvl[u] < lvl[v]) {
                hasj = 1;
                v = p[0][v];
            }
            if (u == v) {
                continue;
            }
            if (hasj) {
                jump(v, 0);
            } else {
                v = p[0][v];
            }
            jump(u, 0);
            RREP (k, MAXL - 1, 0) {
                if (p[k][u] != p[k][v]) {
                    jump(u, k);
                    jump(v, k);
                }
            }
            if (u != v) {
                jump(u, 0); jump(v, 0);
            }
            jump(u, 0);
        }
        cyc = 0;
        REP (i, 0, ptr) {
            if (vis[i]) continue;
            rdfs(i);
            if (cyc) {
                break;
            }
        }
        if (cyc) {
            cout << "No\n";
        } else {
            cout << "Yes\n";
        }
        REP (i, 0, ptr) {
            radj[i].clear();
            vis[i] = 0;
        }
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380904 KB Output is correct
2 Correct 194 ms 380944 KB Output is correct
3 Correct 178 ms 380876 KB Output is correct
4 Correct 193 ms 381084 KB Output is correct
5 Correct 221 ms 381004 KB Output is correct
6 Correct 184 ms 381212 KB Output is correct
7 Correct 183 ms 381256 KB Output is correct
8 Correct 182 ms 381128 KB Output is correct
9 Correct 450 ms 388048 KB Output is correct
10 Correct 1438 ms 553384 KB Output is correct
11 Correct 191 ms 381004 KB Output is correct
12 Correct 242 ms 381104 KB Output is correct
13 Correct 1300 ms 558116 KB Output is correct
14 Correct 1152 ms 558180 KB Output is correct
15 Correct 1708 ms 584428 KB Output is correct
16 Correct 2179 ms 641024 KB Output is correct
17 Correct 1545 ms 562568 KB Output is correct
18 Correct 1284 ms 562268 KB Output is correct
19 Correct 1494 ms 562480 KB Output is correct
20 Correct 1121 ms 562456 KB Output is correct
21 Correct 1405 ms 585024 KB Output is correct
22 Correct 1020 ms 557920 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380876 KB Output is correct
2 Correct 178 ms 380956 KB Output is correct
3 Correct 184 ms 381196 KB Output is correct
4 Correct 189 ms 381164 KB Output is correct
5 Correct 182 ms 381104 KB Output is correct
6 Correct 182 ms 381136 KB Output is correct
7 Correct 183 ms 381108 KB Output is correct
8 Correct 180 ms 381244 KB Output is correct
9 Correct 180 ms 381156 KB Output is correct
10 Correct 179 ms 381052 KB Output is correct
11 Correct 179 ms 381056 KB Output is correct
12 Incorrect 177 ms 381024 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380876 KB Output is correct
2 Correct 178 ms 380956 KB Output is correct
3 Correct 184 ms 381196 KB Output is correct
4 Correct 189 ms 381164 KB Output is correct
5 Correct 182 ms 381104 KB Output is correct
6 Correct 182 ms 381136 KB Output is correct
7 Correct 183 ms 381108 KB Output is correct
8 Correct 180 ms 381244 KB Output is correct
9 Correct 180 ms 381156 KB Output is correct
10 Correct 179 ms 381052 KB Output is correct
11 Correct 179 ms 381056 KB Output is correct
12 Incorrect 177 ms 381024 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380876 KB Output is correct
2 Correct 178 ms 380956 KB Output is correct
3 Correct 184 ms 381196 KB Output is correct
4 Correct 189 ms 381164 KB Output is correct
5 Correct 182 ms 381104 KB Output is correct
6 Correct 182 ms 381136 KB Output is correct
7 Correct 183 ms 381108 KB Output is correct
8 Correct 180 ms 381244 KB Output is correct
9 Correct 180 ms 381156 KB Output is correct
10 Correct 179 ms 381052 KB Output is correct
11 Correct 179 ms 381056 KB Output is correct
12 Incorrect 177 ms 381024 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380876 KB Output is correct
2 Correct 178 ms 380956 KB Output is correct
3 Correct 184 ms 381196 KB Output is correct
4 Correct 189 ms 381164 KB Output is correct
5 Correct 182 ms 381104 KB Output is correct
6 Correct 182 ms 381136 KB Output is correct
7 Correct 183 ms 381108 KB Output is correct
8 Correct 180 ms 381244 KB Output is correct
9 Correct 180 ms 381156 KB Output is correct
10 Correct 179 ms 381052 KB Output is correct
11 Correct 179 ms 381056 KB Output is correct
12 Incorrect 177 ms 381024 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 184 ms 380992 KB Output is correct
2 Correct 197 ms 380948 KB Output is correct
3 Correct 178 ms 380976 KB Output is correct
4 Correct 178 ms 380940 KB Output is correct
5 Correct 191 ms 380904 KB Output is correct
6 Incorrect 181 ms 381004 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 380904 KB Output is correct
2 Correct 194 ms 380944 KB Output is correct
3 Correct 178 ms 380876 KB Output is correct
4 Correct 193 ms 381084 KB Output is correct
5 Correct 221 ms 381004 KB Output is correct
6 Correct 184 ms 381212 KB Output is correct
7 Correct 183 ms 381256 KB Output is correct
8 Correct 182 ms 381128 KB Output is correct
9 Correct 450 ms 388048 KB Output is correct
10 Correct 1438 ms 553384 KB Output is correct
11 Correct 191 ms 381004 KB Output is correct
12 Correct 242 ms 381104 KB Output is correct
13 Correct 1300 ms 558116 KB Output is correct
14 Correct 1152 ms 558180 KB Output is correct
15 Correct 1708 ms 584428 KB Output is correct
16 Correct 2179 ms 641024 KB Output is correct
17 Correct 1545 ms 562568 KB Output is correct
18 Correct 1284 ms 562268 KB Output is correct
19 Correct 1494 ms 562480 KB Output is correct
20 Correct 1121 ms 562456 KB Output is correct
21 Correct 1405 ms 585024 KB Output is correct
22 Correct 1020 ms 557920 KB Output is correct
23 Correct 181 ms 380876 KB Output is correct
24 Correct 178 ms 380956 KB Output is correct
25 Correct 184 ms 381196 KB Output is correct
26 Correct 189 ms 381164 KB Output is correct
27 Correct 182 ms 381104 KB Output is correct
28 Correct 182 ms 381136 KB Output is correct
29 Correct 183 ms 381108 KB Output is correct
30 Correct 180 ms 381244 KB Output is correct
31 Correct 180 ms 381156 KB Output is correct
32 Correct 179 ms 381052 KB Output is correct
33 Correct 179 ms 381056 KB Output is correct
34 Incorrect 177 ms 381024 KB Output isn't correct
35 Halted 0 ms 0 KB -