oj.uz

Submission #410165

# Submission time Handle Problem Language Result Execution time Memory
410165 2021-05-22T06:50:22 Z jhwest2 Meetings 2 (JOI21_meetings2) C++14
20 / 100
 4000 ms 29116 KB 
#include <bits/stdc++.h>
#define va first
#define vb second
using namespace std;
typedef long long lint;
typedef pair<int, int> pint;
const int M = 2e5 + 10;
const int INF = 1e9 + 10;
 
int n, Sub[M], Chk[M], Dep[M];
vector<int> G[M];
 
struct SEG {
    int T[M << 2], L[M << 2];
 
    void init() {
        for (int i = 0; i < M << 2; i++) L[i] = -2 * INF;
    }
    void push(int lo, int hi, int idx) {
        if (L[idx] == -2 * INF) return;
        if (lo != hi) {
            L[idx << 1] = L[idx];
            L[idx << 1 | 1] = L[idx];
        }
        T[idx] = L[idx]; L[idx] = -2 * INF;
    }
    int update(int a, int b, int x, int lo = 1, int hi = n, int idx = 1) {
        push(lo, hi, idx);
        if (b < lo || a > hi) return T[idx];
        if (a <= lo && hi <= b) {
            L[idx] = x; push(lo, hi, idx); return T[idx];
        }
        return T[idx] = max(update(a, b, x, lo, lo + hi >> 1, idx << 1), update(a, b, x, 1 + (lo + hi >> 1), hi, idx << 1 | 1));
    }
    int query(int a, int lo = 1, int hi = n, int idx = 1) {
        push(lo, hi, idx);
        if (lo == hi) return T[idx];
        if (a <= lo + hi >> 1) return query(a, lo, lo + hi >> 1, idx << 1);
        else return query(a, 1 + (lo + hi >> 1), hi, idx << 1 | 1);
    }
} S, Ans;
 
 
void dfs(int p, int cur) {
    Sub[cur] = 1; 
    for (int x : G[cur]) if (p != x && !Chk[x]) {
        dfs(cur, x); Sub[cur] += Sub[x];
    }
}
int cent(int p, int cur, int s) {
    for (int x : G[cur]) if (p != x && !Chk[x]) {
        if (Sub[x] > s / 2) return cent(cur, x, s);
    }
    return cur;
}
void dfs2(int p, int cur) {
    if (Chk[cur]) return; Sub[cur] = 1;
    for (int x : G[cur]) if (p != x) {
        Dep[x] = Dep[cur] + 1;
        dfs2(cur, x); Sub[cur] += Sub[x];
    }
}
void dp(int p, int cur) {
    for (int x : G[cur]) if (p != x && !Chk[x]) {
        dp(cur, x);
    }
    int a = S.query(Sub[cur]);
    if (a == -INF) return;
 
    int lo = 1, hi = Sub[cur] + 1;
    while (lo < hi) {
        if (Ans.query(lo + hi >> 1) <= Dep[cur] + a) hi = lo + hi >> 1;
        else lo = 1 + (lo + hi >> 1);
    }
    Ans.update(lo, Sub[cur], Dep[cur] + a);
}
void update(int p, int cur) {
    int lo = 1, hi = Sub[cur] + 1;
    while (lo < hi) {
        int m = lo + hi >> 1;
        if (S.query(m) <= Dep[cur]) hi = m;
        else lo = m + 1;
    }
    S.update(lo, Sub[cur], Dep[cur]);
    for (int x : G[cur]) if (p != x && !Chk[x]) {
        update(cur, x);
    }
}
void solve(int cur) {
    dfs(cur, cur); int k = cent(cur, cur, Sub[cur]);
    Dep[k] = 0; Sub[k] = 1;
    S.update(1, n, -INF);
    for (int i = 0; i < G[k].size(); i++) if (!Chk[G[k][i]]) {
        int x = G[k][i]; Dep[x] = 1;
        dfs2(k, x);
        int lo = 1, hi = n - Sub[x];
        while (lo < hi) {
            int m = lo + hi >> 1;
            if (S.query(m) != -INF) lo = m + 1;
            else hi = m;
        }
        S.update(lo, n - Sub[x], 0);
        dp(k, x); update(k, x);
        lo = 1, hi = n - Sub[x];
        while (lo < hi) {
            int m = lo + hi >> 1;
            if (S.query(m) != 0) lo = m + 1;
            else hi = m;
        }
        S.update(lo, n - Sub[x], -INF);
    }
    S.update(1, n, -INF);
    for (int i= G[k].size() -1; i >= 0; i--) if (!Chk[G[k][i]]) {
        int x = G[k][i];
        dp(k, x); update(k, x);
    }
 
    Chk[k] = 1;
    vector<int> V(G[k].size());
    for (int i = 0; i < G[k].size(); i++) V[i] = Sub[G[k][i]];
    for (int i = 0; i < G[k].size(); i++) if (!Chk[G[k][i]]) {
        Sub[k] = n - V[i]; solve(G[k][i]);
    }
}
 
int main() {
    cin.tie(0); ios_base::sync_with_stdio(0);
    cin >> n;
    for (int i = 1; i < n; i++) {
        int x, y; cin >> x >> y;
        G[x].push_back(y); G[y].push_back(x);
    }
    S.init(); solve(1);
    for (int i = 1; i <= n; i++) {
        if (i & 1) cout << 1 << '\n';
        else cout << Ans.query(i / 2) + 1 << '\n';
    }
}

Compilation message

meetings2.cpp: In member function 'int SEG::update(int, int, int, int, int, int)':
meetings2.cpp:33:52: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |         return T[idx] = max(update(a, b, x, lo, lo + hi >> 1, idx << 1), update(a, b, x, 1 + (lo + hi >> 1), hi, idx << 1 | 1));
      |                                                 ~~~^~~~
meetings2.cpp:33:98: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |         return T[idx] = max(update(a, b, x, lo, lo + hi >> 1, idx << 1), update(a, b, x, 1 + (lo + hi >> 1), hi, idx << 1 | 1));
      |                                                                                               ~~~^~~~
meetings2.cpp: In member function 'int SEG::query(int, int, int, int)':
meetings2.cpp:38:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |         if (a <= lo + hi >> 1) return query(a, lo, lo + hi >> 1, idx << 1);
      |                  ~~~^~~~
meetings2.cpp:38:55: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |         if (a <= lo + hi >> 1) return query(a, lo, lo + hi >> 1, idx << 1);
      |                                                    ~~~^~~~
meetings2.cpp:39:38: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |         else return query(a, 1 + (lo + hi >> 1), hi, idx << 1 | 1);
      |                                   ~~~^~~~
meetings2.cpp: In function 'void dfs2(int, int)':
meetings2.cpp:57:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   57 |     if (Chk[cur]) return; Sub[cur] = 1;
      |     ^~
meetings2.cpp:57:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   57 |     if (Chk[cur]) return; Sub[cur] = 1;
      |                           ^~~
meetings2.cpp: In function 'void dp(int, int)':
meetings2.cpp:72:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   72 |         if (Ans.query(lo + hi >> 1) <= Dep[cur] + a) hi = lo + hi >> 1;
      |                       ~~~^~~~
meetings2.cpp:72:62: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   72 |         if (Ans.query(lo + hi >> 1) <= Dep[cur] + a) hi = lo + hi >> 1;
      |                                                           ~~~^~~~
meetings2.cpp:73:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   73 |         else lo = 1 + (lo + hi >> 1);
      |                        ~~~^~~~
meetings2.cpp: In function 'void update(int, int)':
meetings2.cpp:80:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   80 |         int m = lo + hi >> 1;
      |                 ~~~^~~~
meetings2.cpp: In function 'void solve(int)':
meetings2.cpp:93:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |     for (int i = 0; i < G[k].size(); i++) if (!Chk[G[k][i]]) {
      |                     ~~^~~~~~~~~~~~~
meetings2.cpp:98:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   98 |             int m = lo + hi >> 1;
      |                     ~~~^~~~
meetings2.cpp:106:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  106 |             int m = lo + hi >> 1;
      |                     ~~~^~~~
meetings2.cpp:120:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for (int i = 0; i < G[k].size(); i++) V[i] = Sub[G[k][i]];
      |                     ~~^~~~~~~~~~~~~
meetings2.cpp:121:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 |     for (int i = 0; i < G[k].size(); i++) if (!Chk[G[k][i]]) {
      |                     ~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8140 KB Output is correct
2 Correct 6 ms 8140 KB Output is correct
3 Correct 6 ms 8132 KB Output is correct
4 Correct 6 ms 8140 KB Output is correct
5 Correct 6 ms 8140 KB Output is correct
6 Correct 6 ms 8140 KB Output is correct
7 Correct 6 ms 8100 KB Output is correct
8 Correct 6 ms 8100 KB Output is correct
9 Correct 7 ms 8192 KB Output is correct
10 Correct 8 ms 8140 KB Output is correct
11 Correct 6 ms 8100 KB Output is correct
12 Correct 6 ms 8100 KB Output is correct
13 Correct 6 ms 8176 KB Output is correct
14 Correct 6 ms 8156 KB Output is correct
15 Correct 6 ms 8140 KB Output is correct
16 Correct 6 ms 8092 KB Output is correct
17 Correct 6 ms 8140 KB Output is correct
18 Correct 6 ms 8140 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8140 KB Output is correct
21 Correct 6 ms 8140 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8140 KB Output is correct
2 Correct 6 ms 8140 KB Output is correct
3 Correct 6 ms 8132 KB Output is correct
4 Correct 6 ms 8140 KB Output is correct
5 Correct 6 ms 8140 KB Output is correct
6 Correct 6 ms 8140 KB Output is correct
7 Correct 6 ms 8100 KB Output is correct
8 Correct 6 ms 8100 KB Output is correct
9 Correct 7 ms 8192 KB Output is correct
10 Correct 8 ms 8140 KB Output is correct
11 Correct 6 ms 8100 KB Output is correct
12 Correct 6 ms 8100 KB Output is correct
13 Correct 6 ms 8176 KB Output is correct
14 Correct 6 ms 8156 KB Output is correct
15 Correct 6 ms 8140 KB Output is correct
16 Correct 6 ms 8092 KB Output is correct
17 Correct 6 ms 8140 KB Output is correct
18 Correct 6 ms 8140 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8140 KB Output is correct
21 Correct 6 ms 8140 KB Output is correct
22 Correct 46 ms 8396 KB Output is correct
23 Correct 37 ms 8436 KB Output is correct
24 Correct 36 ms 8464 KB Output is correct
25 Correct 35 ms 8464 KB Output is correct
26 Correct 35 ms 8456 KB Output is correct
27 Correct 42 ms 8436 KB Output is correct
28 Correct 43 ms 8476 KB Output is correct
29 Correct 40 ms 8456 KB Output is correct
30 Correct 35 ms 8536 KB Output is correct
31 Correct 35 ms 8460 KB Output is correct
32 Correct 79 ms 8496 KB Output is correct
33 Correct 101 ms 8616 KB Output is correct
34 Correct 18 ms 8396 KB Output is correct
35 Correct 16 ms 8428 KB Output is correct
36 Correct 50 ms 8492 KB Output is correct
37 Correct 20 ms 8480 KB Output is correct
38 Correct 58 ms 8588 KB Output is correct

Subtask #3
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8140 KB Output is correct
2 Correct 6 ms 8140 KB Output is correct
3 Correct 6 ms 8132 KB Output is correct
4 Correct 6 ms 8140 KB Output is correct
5 Correct 6 ms 8140 KB Output is correct
6 Correct 6 ms 8140 KB Output is correct
7 Correct 6 ms 8100 KB Output is correct
8 Correct 6 ms 8100 KB Output is correct
9 Correct 7 ms 8192 KB Output is correct
10 Correct 8 ms 8140 KB Output is correct
11 Correct 6 ms 8100 KB Output is correct
12 Correct 6 ms 8100 KB Output is correct
13 Correct 6 ms 8176 KB Output is correct
14 Correct 6 ms 8156 KB Output is correct
15 Correct 6 ms 8140 KB Output is correct
16 Correct 6 ms 8092 KB Output is correct
17 Correct 6 ms 8140 KB Output is correct
18 Correct 6 ms 8140 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8140 KB Output is correct
21 Correct 6 ms 8140 KB Output is correct
22 Correct 46 ms 8396 KB Output is correct
23 Correct 37 ms 8436 KB Output is correct
24 Correct 36 ms 8464 KB Output is correct
25 Correct 35 ms 8464 KB Output is correct
26 Correct 35 ms 8456 KB Output is correct
27 Correct 42 ms 8436 KB Output is correct
28 Correct 43 ms 8476 KB Output is correct
29 Correct 40 ms 8456 KB Output is correct
30 Correct 35 ms 8536 KB Output is correct
31 Correct 35 ms 8460 KB Output is correct
32 Correct 79 ms 8496 KB Output is correct
33 Correct 101 ms 8616 KB Output is correct
34 Correct 18 ms 8396 KB Output is correct
35 Correct 16 ms 8428 KB Output is correct
36 Correct 50 ms 8492 KB Output is correct
37 Correct 20 ms 8480 KB Output is correct
38 Correct 58 ms 8588 KB Output is correct
39 Correct 3594 ms 23512 KB Output is correct
40 Correct 3427 ms 22856 KB Output is correct
41 Correct 3487 ms 23412 KB Output is correct
42 Correct 3376 ms 23640 KB Output is correct
43 Correct 3474 ms 23520 KB Output is correct
44 Correct 3561 ms 23508 KB Output is correct
45 Execution timed out 4061 ms 29116 KB Time limit exceeded
46 Halted 0 ms 0 KB -