oj.uz

답안 #796743

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
796743 2023-07-28T16:42:05 Z GrindMachine Power Plant (JOI20_power) C++17
0 / 100
 4 ms 6484 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

read edi long time ago, dont exactly remember the approach in the edi

*/

const int MOD = 1e9 + 7;
const int N = 2e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<ll> adj[N];
vector<ll> a(N);

void solve(int test_case)
{
    ll n; cin >> n;
    rep1(i,n-1){
        ll u,v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }    

    rep1(i,n){
        char ch; cin >> ch;
        a[i] = ch-'0';
    }

    ll ans = 0;

    rep1(r,n){
        if(!a[r]) conts;

        queue<pll> q;
        q.push({r,-1});
        vector<bool> vis(n+5);
        vis[r] = 1;

        map<ll,ll> mp;

        while(!q.empty()){
            auto [u,sub] = q.front();
            q.pop();

            if(a[u] and u != r){
                mp[sub]++;
                conts;
            }

            trav(v,adj[u]){
                if(vis[v]) conts;
                pll p = {v,sub};
                if(sub == -1) p.ss = v;
                q.push(p);
                vis[v] = 1;
            }
        }

        vector<ll> b;
        trav(p,mp) b.pb(p.ss);
        
        sort(rall(b));

        ll val = 1;
        if(!b.empty()){
            val = max(accumulate(all(b),0ll)-1,b[0]+1);
        }

        amax(ans,val);
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
0.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6484 KB Output is correct
2 Correct 4 ms 6484 KB Output is correct
3 Correct 3 ms 6484 KB Output is correct
4 Correct 3 ms 6484 KB Output is correct
5 Incorrect 3 ms 6484 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6484 KB Output is correct
2 Correct 4 ms 6484 KB Output is correct
3 Correct 3 ms 6484 KB Output is correct
4 Correct 3 ms 6484 KB Output is correct
5 Incorrect 3 ms 6484 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6484 KB Output is correct
2 Correct 4 ms 6484 KB Output is correct
3 Correct 3 ms 6484 KB Output is correct
4 Correct 3 ms 6484 KB Output is correct
5 Incorrect 3 ms 6484 KB Output isn't correct
6 Halted 0 ms 0 KB -