oj.uz

Submission #440470

# Submission time Handle Problem Language Result Execution time Memory
440470 2021-07-02T10:09:10 Z Millad Burza (COCI16_burza) C++14
0 / 160
 1 ms 344 KB 
// In the name of god
#include <bits/stdc++.h>

#define F first
#define S second
#define pb push_back
#define all(x) x.begin(), x.end()
#define Sort(x) sort(all(x))
#define debug(x) cerr << #x << " : " << x << "\n"
#define usefile freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef string str;

const ll maxn = 1e3 + 5;
const ll mod = 1e9 + 7;
const ll inf = 1e18;
const ll sq = 500;

ll n, k;
bool dp[30][maxn];
vector <ll> adj[maxn];
void dfs(ll u, ll p){
 	dp[0][u] = 1;
        for(ll j : adj[u]){
                if(j == p)continue;
                dfs(j, u);
        }
        for(ll i = 1; i <= k; i ++){
                ll cnt = 0;
                for(ll j : adj[u]){
                        if(j == p)continue;
                        if(dp[i - 1][j]) cnt ++;
                }
                if(cnt > 1)dp[i][u] = 1;
        }
}
int main(){
        ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
        cin >> n >> k;
        if(k > 19)return cout << "NE", 0;
        for(ll i = 1; i < n; i ++){
                ll u, v; cin >> u >> v;
                adj[u].pb(v);
                adj[v].pb(u);
        }
        dfs(1, 0);
        if(!dp[k][1])cout << "DA";
        else cout << "NE";
}

Subtask #1
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -