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답안 #567490

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
567490 2022-05-23T15:17:49 Z maomao90 Jail (JOI22_jail) C++17
5 / 100
 2269 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;
    REP (k, 1, MAXL) {
        if (p[k - 1][u] == -1) {
            p[k][u] = -1;
            id[k][u] = -1;
        } else {
            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);
            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);
            }
            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);
        }
        dfs(1, -1);
        REP (i, 0, m) {
            int u = s[i], v = t[i];
            if (mpt[u] != 0) {
                radj[i].pb(mpt[u]);
            }
            if (mps[v] != 0) {
                radj[mps[v]].pb(i);
            }
            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);
                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);
            }
            assert(u == v);
            jump(u, 0);
        }
        cyc = 0;
        REP (i, 0, m) {
            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 183 ms 380876 KB Output is correct
2 Correct 179 ms 380872 KB Output is correct
3 Correct 192 ms 380940 KB Output is correct
4 Correct 206 ms 381056 KB Output is correct
5 Correct 229 ms 381084 KB Output is correct
6 Correct 190 ms 381252 KB Output is correct
7 Correct 182 ms 381204 KB Output is correct
8 Correct 181 ms 381192 KB Output is correct
9 Correct 463 ms 387964 KB Output is correct
10 Correct 1010 ms 553388 KB Output is correct
11 Correct 200 ms 381004 KB Output is correct
12 Correct 245 ms 381028 KB Output is correct
13 Correct 1238 ms 558084 KB Output is correct
14 Correct 1161 ms 558200 KB Output is correct
15 Correct 1760 ms 584508 KB Output is correct
16 Correct 2269 ms 641024 KB Output is correct
17 Correct 1411 ms 562536 KB Output is correct
18 Correct 1249 ms 562228 KB Output is correct
19 Correct 1377 ms 562460 KB Output is correct
20 Correct 1143 ms 562504 KB Output is correct
21 Correct 1426 ms 585056 KB Output is correct
22 Correct 1049 ms 557656 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 182 ms 380996 KB Output is correct
2 Correct 208 ms 380900 KB Output is correct
3 Correct 188 ms 381132 KB Output is correct
4 Correct 182 ms 381156 KB Output is correct
5 Correct 201 ms 381164 KB Output is correct
6 Correct 190 ms 381156 KB Output is correct
7 Correct 194 ms 381104 KB Output is correct
8 Correct 195 ms 381192 KB Output is correct
9 Correct 183 ms 381104 KB Output is correct
10 Correct 190 ms 381132 KB Output is correct
11 Correct 210 ms 381132 KB Output is correct
12 Incorrect 180 ms 381072 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 182 ms 380996 KB Output is correct
2 Correct 208 ms 380900 KB Output is correct
3 Correct 188 ms 381132 KB Output is correct
4 Correct 182 ms 381156 KB Output is correct
5 Correct 201 ms 381164 KB Output is correct
6 Correct 190 ms 381156 KB Output is correct
7 Correct 194 ms 381104 KB Output is correct
8 Correct 195 ms 381192 KB Output is correct
9 Correct 183 ms 381104 KB Output is correct
10 Correct 190 ms 381132 KB Output is correct
11 Correct 210 ms 381132 KB Output is correct
12 Incorrect 180 ms 381072 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 182 ms 380996 KB Output is correct
2 Correct 208 ms 380900 KB Output is correct
3 Correct 188 ms 381132 KB Output is correct
4 Correct 182 ms 381156 KB Output is correct
5 Correct 201 ms 381164 KB Output is correct
6 Correct 190 ms 381156 KB Output is correct
7 Correct 194 ms 381104 KB Output is correct
8 Correct 195 ms 381192 KB Output is correct
9 Correct 183 ms 381104 KB Output is correct
10 Correct 190 ms 381132 KB Output is correct
11 Correct 210 ms 381132 KB Output is correct
12 Incorrect 180 ms 381072 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 182 ms 380996 KB Output is correct
2 Correct 208 ms 380900 KB Output is correct
3 Correct 188 ms 381132 KB Output is correct
4 Correct 182 ms 381156 KB Output is correct
5 Correct 201 ms 381164 KB Output is correct
6 Correct 190 ms 381156 KB Output is correct
7 Correct 194 ms 381104 KB Output is correct
8 Correct 195 ms 381192 KB Output is correct
9 Correct 183 ms 381104 KB Output is correct
10 Correct 190 ms 381132 KB Output is correct
11 Correct 210 ms 381132 KB Output is correct
12 Incorrect 180 ms 381072 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 197 ms 380908 KB Output is correct
2 Correct 189 ms 380936 KB Output is correct
3 Correct 179 ms 380892 KB Output is correct
4 Correct 189 ms 380968 KB Output is correct
5 Correct 189 ms 380996 KB Output is correct
6 Incorrect 181 ms 380996 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 183 ms 380876 KB Output is correct
2 Correct 179 ms 380872 KB Output is correct
3 Correct 192 ms 380940 KB Output is correct
4 Correct 206 ms 381056 KB Output is correct
5 Correct 229 ms 381084 KB Output is correct
6 Correct 190 ms 381252 KB Output is correct
7 Correct 182 ms 381204 KB Output is correct
8 Correct 181 ms 381192 KB Output is correct
9 Correct 463 ms 387964 KB Output is correct
10 Correct 1010 ms 553388 KB Output is correct
11 Correct 200 ms 381004 KB Output is correct
12 Correct 245 ms 381028 KB Output is correct
13 Correct 1238 ms 558084 KB Output is correct
14 Correct 1161 ms 558200 KB Output is correct
15 Correct 1760 ms 584508 KB Output is correct
16 Correct 2269 ms 641024 KB Output is correct
17 Correct 1411 ms 562536 KB Output is correct
18 Correct 1249 ms 562228 KB Output is correct
19 Correct 1377 ms 562460 KB Output is correct
20 Correct 1143 ms 562504 KB Output is correct
21 Correct 1426 ms 585056 KB Output is correct
22 Correct 1049 ms 557656 KB Output is correct
23 Correct 182 ms 380996 KB Output is correct
24 Correct 208 ms 380900 KB Output is correct
25 Correct 188 ms 381132 KB Output is correct
26 Correct 182 ms 381156 KB Output is correct
27 Correct 201 ms 381164 KB Output is correct
28 Correct 190 ms 381156 KB Output is correct
29 Correct 194 ms 381104 KB Output is correct
30 Correct 195 ms 381192 KB Output is correct
31 Correct 183 ms 381104 KB Output is correct
32 Correct 190 ms 381132 KB Output is correct
33 Correct 210 ms 381132 KB Output is correct
34 Incorrect 180 ms 381072 KB Output isn't correct
35 Halted 0 ms 0 KB -