Submission #1093072

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093072		vladilius	Meetings 2 (JOI21_meetings2)	C++17	20 / 100	650 ms	262144 KiB

meetings2

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
 
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n; cin>>n;
    vector<int> g[n + 1];
    for (int i = 1; i < n; i++){
        int x, y; cin>>x>>y;
        g[x].pb(y);
        g[y].pb(x);
    }
    
    vector<vector<int>> dist(n + 1, vector<int>(n + 1));
    function<void(int, int, int, int&)> fill = [&](int v, int pr, int d, int& u){
        dist[u][v] = d++;
        for (int i: g[v]){
            if (i == pr) continue;
            fill(i, v, d, u);
        }
    };
    
    for (int i = 1; i <= n; i++) fill(i, 0, 0, i);
    
    vector<vector<int>> sz(n + 1, vector<int>(n + 1));
    function<void(int, int, int&)> fill_sz = [&](int v, int pr, int& u){
        sz[u][v] = 1;
        for (int i: g[v]){
            if (i == pr) continue;
            fill_sz(i, v, u);
            sz[u][v] += sz[u][i];
        }
    };
    for (int i = 1; i <= n; i++) fill_sz(i, 0, i);
    
    vector<int> p(n + 1, 1);
    for (int i = 1; i <= n; i++){
        for (int j = i + 1; j <= n; j++){
            int s = min(sz[i][j], sz[j][i]);
            p[s] = max(p[s], dist[i][j] + 1);
        }
    }
    
    for (int i = n - 1; i > 0; i--) p[i] = max(p[i], p[i + 1]);
    
    for (int x = 1; x <= n; x++){
        if (x % 2){
            cout<<1<<"\n";
            continue;
        }
        cout<<p[x / 2]<<"\n";
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 16 / 16
• Subtask 3: 0 / 80