제출 #928164

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
928164		trMatherz	Burza (COCI16_burza)	C++17	0 / 160	1 ms	536 KiB

burza

#include <iostream> //cin, cout

/*
#include <fstream>
std::ifstream cin ("ex.in");
std::ofstream cout ("ex.out");
*/




// includes
#include <cmath> 
#include <set>
#include <map>
#include <queue>
#include <string>
#include <vector>
#include <array>
#include <algorithm>
#include <numeric>
#include <iomanip>
#include <unordered_set>
#include <stack>
#include <ext/pb_ds/assoc_container.hpp>
#include <random>
#include <chrono>
#include <bitset>
#include <complex>


//usings 
using namespace std;
using namespace __gnu_pbds;


// misc
#define ll long long
#define ld long double
#define pb push_back
#define pq priority_queue
#define ub upper_bound
#define lb lower_bound
template<typename T, typename U> bool emin(T &a, const U &b){ return b < a ? a = b, true : false; }
template<typename T, typename U> bool emax(T &a, const U &b){ return b > a ? a = b, true : false; }
typedef uint64_t hash_t;

// vectors
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vpii vector<pair<int, int>>
#define vvpii vector<vector<pair<int, int>>>
#define vppipi vector<pair<int, pair<int, int>>>
#define vl vector<ll>
#define vvl vector<vl>
#define vvvl vector<vvl>
#define vpll vector<pair<ll, ll>>
#define vvpll vector<vpll>
#define vb vector<bool>
#define vvb vector<vb>
#define vs vector<string>
#define sz(x) (int)x.size()
#define rz resize
#define all(x) x.begin(), x.end()


// pairs
#define pii pair<int, int>
#define pll pair<ll, ll>
#define mp make_pair
#define f first
#define s second

// sets
#define si set<int>
#define sl set<ll>
#define ss set<string>
#define in insert
template <class T> using iset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

// maps
#define mii map<int, int>
#define mll map<ll, ll>

// loops
#define FR(x, z, y) for (int x = z; x < y; x++)
#define FRE(x, z, y) FR(x, z, y + 1)
#define F(x, y) FR(x, 0, y)
#define FE(x, y) F(x, y + 1)
#define A(x, y) for(auto &x : y)



vvi a;

vi dp;
int n;

void dfs(int x, int p){
    int top = 0, sec = 0;
    A(u, a[x]) {
        if(u == p) continue;
        dfs(u, x);
        if(dp[u] > top) sec = top, top = dp[u];
        else if(dp[u] > sec) sec = dp[u];
    }
    dp[x] = sec + 1;
}




int main(){
    int k; cin >> n >> k;
    a = vvi(n);
    F(i, n - 1){
        int x, y; cin >> x >> y; x--; y--;
        a[x].pb(y); a[y].pb(x);
    }
    dp = vi(n, 1);
    dfs(0, -1);
    if(dp[0] <= k) cout << "DA";
    else cout << "NE";
}

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