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Submission #1000628

# Submission time Handle Problem Language Result Execution time Memory
1000628 2024-06-18T04:53:12 Z onbert Jail (JOI22_jail) C++17
10 / 100
 999 ms 160396 KB 
#include <bits/stdc++.h>
using namespace std;
const int maxn = 120005, maxN = 480005, lgn = 17, INF = 1e6;
int n, m;
vector<int> ADJ[maxn], adj[maxn];
pair<int,int> a[maxn];
int sz[maxn], fa[maxn], d[maxn], newid[maxn], lim[maxn], cnter = 0;

bool cmp(int &x, int &y) {
    return sz[x] > sz[y];
}

void dfs1(int u) {
    sz[u] = 1;
    for (int v:ADJ[u]) {
        ADJ[v].erase(find(ADJ[v].begin(), ADJ[v].end(), u));
        dfs1(v);
        sz[u] += sz[v];
    }
    sort(ADJ[u].begin(), ADJ[u].end(), cmp);
}
void dfs2(int u) {
    cnter++;
    newid[u] = cnter;
    for (int v:ADJ[u]) {
        d[cnter+1] = d[newid[u]] + 1;
        fa[cnter+1] = newid[u];
        dfs2(v);
    }
    lim[newid[u]] = cnter;
}

int skip[maxn];
void dfs3(int u) {
    for (int v:adj[u]) {
        if (v == adj[u][0]) skip[v] = skip[u];
        else skip[v] = v;
        dfs3(v);
    }
}

vector<pair<int,int>> path;
void PATH(int u, int v) {
    // bool TEST = (u == a[3].first && v == a[3].second);
    path.clear();
    if (d[u] > d[v]) swap(u, v);
    path = {{skip[u], u}};
    u = skip[u];
    while (u>v || v>lim[u]) {
        u = fa[u];
        path.push_back({skip[u], u});
        u = skip[u];
    }
    auto [l, r] = path.back();
    while (l<r) {
        int mid = (l+r+1)/2;
        if (mid<=v && v<=lim[mid]) l = mid;
        else r = mid-1;
    }
    path.back().first = u = l;
    path.push_back({skip[v], v});
    v = skip[v];
    while (d[fa[v]] > d[u]) {
        v = fa[v];
        path.push_back({skip[v], v});
        v = skip[v];
    }
    path.back().first += d[u] - d[v] + 1;
    // if (TEST) {
    //     cout << "PATH\n";
    //     for (auto [L, R]:path) cout << L << " " << R << endl;
    // }
}

set<pair<int,int>> chain[maxn];

set<int> seg[maxN];
void build(int id, int l, int r) {
    seg[id].clear();
    if (l==r) return;
    int mid = (l+r)/2;
    build(id*2, l, mid); build(id*2+1, mid+1, r);
}
void update(int id, int l, int r, int &findl, int &findr, int &val, bool psh) {
    if (r<findl || findr<l) return;
    if (findl<=l && r<=findr) {
        if (psh) seg[id].insert(val);
        else seg[id].erase(val);
        // if (val == 3) cout << l << " " << r << " " << psh << endl;
        return;
    }
    int mid = (l+r)/2;
    update(id*2, l, mid, findl, findr, val, psh);
    update(id*2+1, mid+1, r, findl, findr, val, psh);
}
vector<int> nxt;
void qry(int id, int l, int r, int &target) {
    if (r<target || target<l) return;
    for (int i:seg[id]) nxt.push_back(i);
    if (l==r) return;
    int mid = (l+r)/2;
    qry(id*2, l, mid, target); qry(id*2+1, mid+1, r, target);
}

void UPDATE(int l, int r, int val, int psh) {
    // if (val == 3) cout << "test " << l << " " << r << " " << psh << endl;
    if (l==skip[l]) {
        if (psh) chain[l].insert({r, val});
        else chain[l].erase({r, val});
        // cout << l << " " << r << " " << val << " " << psh << endl;
    } else update(1, 1, n, l, r, val, psh);
}

int S[maxn], vis[maxn];
bool die = false;
set<int> exist;

void dfs4(int u) {
    auto [s, t] = a[u];
    // cout << "start " << u << " " << s << " " << t << endl;
    vis[u] = 1;
    PATH(s, t);
    for (auto [L, R]:path) {
        int cur = L-1;
        while (true) {
            cur = *exist.upper_bound(cur);
            if (cur > R) break;
            if (cur==s) continue;
            int v = S[cur];
            // cout << "1 " << u << " " << v << " " << die << endl;
            if (!vis[v]) dfs4(v);
            else die = true;
            if (die) return;
        }
    }
    nxt.clear();
    qry(1, 1, n, t);
    for (int v:nxt) if (v!=u) {
        // cout << "2 " << u << " " << v << " " << die << endl;
        if (!vis[v]) dfs4(v);
        else die = true;
        if (die) return;
    }
    int head = skip[t];
    pair<int,int> cur = {t, 0};
    while (true) {
        cur = *chain[head].upper_bound(cur);
        if (cur.first == INF) break;
        if (cur.second == u) continue;
        int v = cur.second;
        // cout << "3 " << u << " " << v << " " << die << endl;
        if (!vis[v]) dfs4(v);
        else die = true;
        if (die) return;
    }
    PATH(s, t);
    for (auto [L, R]:path) UPDATE(L, R, u, 0);
    exist.erase(s);
    // cout << "killed " << u << endl;
    // vis[u] = 2;
}

void solve() {
    cin >> n;
    for (int i=1;i<=n;i++) sz[i] = 0, adj[i].clear(), ADJ[i].clear();
    cnter = 0;
    for (int i=1;i<=n-1;i++) {
        int u, v;
        cin >> u >> v;
        ADJ[u].push_back(v);
        ADJ[v].push_back(u);
    }
    fa[1] = 0, d[1] = 0;
    dfs1(1); dfs2(1);
    for (int i=1;i<=n;i++) for (int j:ADJ[i]) adj[newid[i]].push_back(newid[j]);
    skip[1] = 1;
    dfs3(1);
    exist = {INF};
    build(1, 1, n);
    for (int i=1;i<=n;i++) chain[i] = {{INF, INF}}, S[i] = -1;
    cin >> m;
    for (int i=1;i<=m;i++) {
        int s, t;
        cin >> s >> t;
        s = newid[s], t = newid[t];
        a[i] = {s, t};
        S[s] = i;
        exist.insert(s);
        PATH(s, t);
        for (auto [L, R]:path) UPDATE(L, R, i, 1);
    }
    for (int i=1;i<=m;i++) vis[i] = 0;
    die = false;
    for (int i=1;i<=m;i++) if (!vis[i]) {
        dfs4(i);
        if (die) break;
    }
    if (die) cout << "No\n";
    else cout << "Yes\n";
}

signed main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int t;
    cin >> t;
    while (t--) solve();
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 38744 KB Output is correct
2 Correct 6 ms 38748 KB Output is correct
3 Correct 6 ms 38748 KB Output is correct
4 Correct 13 ms 38748 KB Output is correct
5 Correct 22 ms 38748 KB Output is correct
6 Correct 6 ms 38748 KB Output is correct
7 Correct 7 ms 38748 KB Output is correct
8 Correct 9 ms 38816 KB Output is correct
9 Correct 37 ms 40280 KB Output is correct
10 Correct 64 ms 65616 KB Output is correct
11 Correct 12 ms 38748 KB Output is correct
12 Correct 45 ms 38840 KB Output is correct
13 Correct 148 ms 85244 KB Output is correct
14 Correct 117 ms 85840 KB Output is correct
15 Correct 309 ms 104908 KB Output is correct
16 Correct 999 ms 160396 KB Output is correct
17 Correct 267 ms 115472 KB Output is correct
18 Correct 235 ms 87120 KB Output is correct
19 Correct 280 ms 112924 KB Output is correct
20 Correct 214 ms 113156 KB Output is correct
21 Correct 245 ms 118100 KB Output is correct
22 Correct 87 ms 75600 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 38744 KB Output is correct
2 Correct 6 ms 39000 KB Output is correct
3 Correct 6 ms 38744 KB Output is correct
4 Correct 8 ms 38748 KB Output is correct
5 Correct 7 ms 38748 KB Output is correct
6 Correct 7 ms 38748 KB Output is correct
7 Correct 9 ms 38748 KB Output is correct
8 Correct 7 ms 38748 KB Output is correct
9 Correct 6 ms 38748 KB Output is correct
10 Correct 6 ms 38808 KB Output is correct
11 Correct 6 ms 38720 KB Output is correct
12 Correct 6 ms 38752 KB Output is correct
13 Correct 6 ms 38712 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 38744 KB Output is correct
2 Correct 6 ms 39000 KB Output is correct
3 Correct 6 ms 38744 KB Output is correct
4 Correct 8 ms 38748 KB Output is correct
5 Correct 7 ms 38748 KB Output is correct
6 Correct 7 ms 38748 KB Output is correct
7 Correct 9 ms 38748 KB Output is correct
8 Correct 7 ms 38748 KB Output is correct
9 Correct 6 ms 38748 KB Output is correct
10 Correct 6 ms 38808 KB Output is correct
11 Correct 6 ms 38720 KB Output is correct
12 Correct 6 ms 38752 KB Output is correct
13 Correct 6 ms 38712 KB Output is correct
14 Correct 6 ms 38744 KB Output is correct
15 Correct 6 ms 38716 KB Output is correct
16 Correct 6 ms 38720 KB Output is correct
17 Correct 7 ms 38748 KB Output is correct
18 Correct 7 ms 38748 KB Output is correct
19 Correct 6 ms 38748 KB Output is correct
20 Incorrect 6 ms 38748 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 38744 KB Output is correct
2 Correct 6 ms 39000 KB Output is correct
3 Correct 6 ms 38744 KB Output is correct
4 Correct 8 ms 38748 KB Output is correct
5 Correct 7 ms 38748 KB Output is correct
6 Correct 7 ms 38748 KB Output is correct
7 Correct 9 ms 38748 KB Output is correct
8 Correct 7 ms 38748 KB Output is correct
9 Correct 6 ms 38748 KB Output is correct
10 Correct 6 ms 38808 KB Output is correct
11 Correct 6 ms 38720 KB Output is correct
12 Correct 6 ms 38752 KB Output is correct
13 Correct 6 ms 38712 KB Output is correct
14 Correct 6 ms 38744 KB Output is correct
15 Correct 6 ms 38716 KB Output is correct
16 Correct 6 ms 38720 KB Output is correct
17 Correct 7 ms 38748 KB Output is correct
18 Correct 7 ms 38748 KB Output is correct
19 Correct 6 ms 38748 KB Output is correct
20 Incorrect 6 ms 38748 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 38744 KB Output is correct
2 Correct 6 ms 39000 KB Output is correct
3 Correct 6 ms 38744 KB Output is correct
4 Correct 8 ms 38748 KB Output is correct
5 Correct 7 ms 38748 KB Output is correct
6 Correct 7 ms 38748 KB Output is correct
7 Correct 9 ms 38748 KB Output is correct
8 Correct 7 ms 38748 KB Output is correct
9 Correct 6 ms 38748 KB Output is correct
10 Correct 6 ms 38808 KB Output is correct
11 Correct 6 ms 38720 KB Output is correct
12 Correct 6 ms 38752 KB Output is correct
13 Correct 6 ms 38712 KB Output is correct
14 Correct 6 ms 38744 KB Output is correct
15 Correct 6 ms 38716 KB Output is correct
16 Correct 6 ms 38720 KB Output is correct
17 Correct 7 ms 38748 KB Output is correct
18 Correct 7 ms 38748 KB Output is correct
19 Correct 6 ms 38748 KB Output is correct
20 Incorrect 6 ms 38748 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 38748 KB Output is correct
2 Correct 6 ms 38716 KB Output is correct
3 Correct 6 ms 38744 KB Output is correct
4 Correct 6 ms 38748 KB Output is correct
5 Correct 12 ms 38748 KB Output is correct
6 Correct 6 ms 38748 KB Output is correct
7 Correct 6 ms 38748 KB Output is correct
8 Correct 6 ms 38748 KB Output is correct
9 Correct 6 ms 38748 KB Output is correct
10 Correct 5 ms 38748 KB Output is correct
11 Correct 5 ms 38740 KB Output is correct
12 Incorrect 7 ms 38748 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 38744 KB Output is correct
2 Correct 6 ms 38748 KB Output is correct
3 Correct 6 ms 38748 KB Output is correct
4 Correct 13 ms 38748 KB Output is correct
5 Correct 22 ms 38748 KB Output is correct
6 Correct 6 ms 38748 KB Output is correct
7 Correct 7 ms 38748 KB Output is correct
8 Correct 9 ms 38816 KB Output is correct
9 Correct 37 ms 40280 KB Output is correct
10 Correct 64 ms 65616 KB Output is correct
11 Correct 12 ms 38748 KB Output is correct
12 Correct 45 ms 38840 KB Output is correct
13 Correct 148 ms 85244 KB Output is correct
14 Correct 117 ms 85840 KB Output is correct
15 Correct 309 ms 104908 KB Output is correct
16 Correct 999 ms 160396 KB Output is correct
17 Correct 267 ms 115472 KB Output is correct
18 Correct 235 ms 87120 KB Output is correct
19 Correct 280 ms 112924 KB Output is correct
20 Correct 214 ms 113156 KB Output is correct
21 Correct 245 ms 118100 KB Output is correct
22 Correct 87 ms 75600 KB Output is correct
23 Correct 5 ms 38744 KB Output is correct
24 Correct 6 ms 39000 KB Output is correct
25 Correct 6 ms 38744 KB Output is correct
26 Correct 8 ms 38748 KB Output is correct
27 Correct 7 ms 38748 KB Output is correct
28 Correct 7 ms 38748 KB Output is correct
29 Correct 9 ms 38748 KB Output is correct
30 Correct 7 ms 38748 KB Output is correct
31 Correct 6 ms 38748 KB Output is correct
32 Correct 6 ms 38808 KB Output is correct
33 Correct 6 ms 38720 KB Output is correct
34 Correct 6 ms 38752 KB Output is correct
35 Correct 6 ms 38712 KB Output is correct
36 Correct 6 ms 38744 KB Output is correct
37 Correct 6 ms 38716 KB Output is correct
38 Correct 6 ms 38720 KB Output is correct
39 Correct 7 ms 38748 KB Output is correct
40 Correct 7 ms 38748 KB Output is correct
41 Correct 6 ms 38748 KB Output is correct
42 Incorrect 6 ms 38748 KB Output isn't correct
43 Halted 0 ms 0 KB -