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답안 #930749

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
930749 2024-02-20T11:15:14 Z Amr Burza (COCI16_burza) C++14
0 / 160
 4 ms 7516 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
ll n , k;
vector<ll> v[N];

ll dfs(ll x, ll par)
{
    multiset<ll> s;
    for(int newn: v[x])
    {
        if(newn==par) continue;
        s.insert(dfs(newn,x));
    }
    if(s.sz<=1) return 1;
    auto it = s.rbegin(); it--;
    return (*it+1);
}
void solve()
{
    cin >> n >> k;
    for(int i = 0; i < n-1; i++)
    {
        ll x, y; cin >> x >> y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    ll x = dfs(1,0);
    if(x<=k) cout << "DA" << endl; else cout << "NE" << endl;

}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
    while(TT--)
        solve();

    return 0;
}

Subtask #1
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 4 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -