제출 #638692

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
638692		swagchicken	Burza (COCI16_burza)	C++14	160 / 160	726 ms	1004 KiB

burza

/*
 ID: swagchicken1
 PROG:
 LANG: C++11
 */
 
#include <iostream>
#include <tuple>
#include <cmath>
#include <string>
#include <cstring>
#include <vector>
#include <deque>
#include <queue>
#include <stack>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <algorithm>
#include <vector>
#include <fstream>
#include <iomanip>
#include <ctime>
#include <cctype>
#include <climits>
#include <chrono>
#include <numeric>
#include <functional>
 
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector< vector <int> > vvi;
typedef pair<int, int> pii;
typedef pair < pair < int, int >, int > piii;
typedef pair < pair <int, int > , pair <int, int> > piiii;
typedef pair<ll, ll> pll;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<string> vs;
 
#define FOR(i,a,b) for(int i = a; i < b; i ++)
#define RFOR(i,a,b) for(int i = a-1; i >= b; i --)
#define all(a) a.begin(), a.end()
#define endl '\n';
#define sz(x) (int)(x).size()
 
#define mp make_pair
#define pb push_back
#define ff first
#define ss second
 
template <typename T>
void pr(vector<T> &v) {
    FOR(i, 0, sz(v)) cout << v[i] << " ";
    cout << endl;
}
template <typename T>
void pr(vector<vector<T> > &v) {
    FOR(i, 0, sz(v)) { pr(v[i]); }
}
template <typename T>
void re(T &x) {
    cin >> x;
}
template <typename T>
void re(vector<T> &a) {
    FOR(i, 0, sz(a)) re(a[i]);
}
template <class Arg, class... Args>
void re(Arg &first, Args &... rest) {
    re(first);
    re(rest...);
}
template <typename T>
void pr(T x) {
    cout << x << endl;
}
template <class Arg, class... Args>
void pr(const Arg &first, const Args &... rest) {
    cout << first << " ";
    pr(rest...);
    cout << endl;
}
void ps() { cout << endl; }
template<class T, class... Ts>
void ps(const T& t, const Ts&... ts) {
    cout << t; if (sizeof...(ts)) cout << " "; ps(ts...);
}
 
const ll MOD  = 1000000007;
#define inf 1e18;
#define INF INT_MAX
//#define DEBUG

long double PI = 4*atan(1);
long double eps = 1e-9;


vvi adj;
int n,k;

int dp[1 << 20] = {};

map<int, int> childtoidx;
map<int, vi> nodesatdepth;
map<int, pair<int, int>> nodetorange;
int numend = 0;

pii dfs(int u, int p, int d) {
    nodesatdepth[d].pb(u);
    if(d == k) {
        numend++;
        nodetorange[u] = {numend, numend};
        return {numend, numend};
    }
    pii cover = {1e9, -1};
    for(int nxt : adj[u]) {
        if(nxt != p) {
            pii childcover = dfs(nxt, u, d+1);
            if(childcover != make_pair((int) 1e9, -1)) {
                cover.ff = min(cover.ff, childcover.ff);
                cover.ss = max(cover.ss, childcover.ss);
            }
        }
    }
    nodetorange[u] = cover;
    return cover;
}

int main() {
    //auto start = chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);cin.tie(0);
    //ofstream cout("output.txt");
    //ifstream cin("input.txt");
    #ifdef DEBUG
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
        // freopen("cowjog.in", "r", stdin);
        // freopen("cowjog.out", "w", stdout);
    #endif

    
    
    cin >> n >> k;
    adj.resize(n);
    FOR(i,0,n-1) {
        int a,b; cin >> a >> b; a--; b--;
        adj[a].pb(b);
        adj[b].pb(a);
    }
    if(k >= 20) {
        cout << "DA" << endl;
        return 0;
    }
    dfs(0, -1, 0);

    // for(auto x : nodetorange) {
    //     cout << x.ff << ": [" << x.ss.ff << "," << x.ss.ss << "]" << endl;
    // }

    // FOR(i,1,k+1) {
    //     pr(nodesatdepth[i]);
    // }

    dp[0] = 0;
    FOR(i,1,(1 << k)) {
        FOR(j,0,k) {
            if(i & (1 << j)) {
                int maxcover = dp[i ^ (1 << j)];
                for(auto v : nodesatdepth[j + 1]) {
                    if(nodetorange[v].ff <= maxcover + 1) {
                        dp[i] = max(dp[i], nodetorange[v].ss);
                    }
                }
                if(dp[i] == numend) {
                    cout << "DA" << endl;
                    return 0;
                }
            }
        }
    }

    // FOR(i,0,(1 << k)) cout << dp[i] << " ";
    // cout << endl;

    cout << "NE" << endl;


    


    //auto stop = chrono::high_resolution_clock::now();
    //auto duration = chrono::duration_cast<chrono::microseconds>(stop - start);
    //cout << duration.count() << endl;
    //cin.close();
    //cout.close();
}

• Subtask 1: 16 / 16
• Subtask 2: 16 / 16
• Subtask 3: 16 / 16
• Subtask 4: 16 / 16
• Subtask 5: 16 / 16
• Subtask 6: 16 / 16
• Subtask 7: 16 / 16
• Subtask 8: 16 / 16
• Subtask 9: 16 / 16
• Subtask 10: 16 / 16