oj.uz

답안 #400024

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
400024 2021-05-07T07:08:37 Z Radman_ Burza (COCI16_burza) C++14
0 / 160
 60 ms 1184 KB 
//                  //
//     Radmanシ     //
//                 //
#include<iostream>
#include<vector>
#include<algorithm>
#include<map>
#include<set>
#include<queue>

using namespace std;

//#define int long long

typedef pair<int,int> pii;
typedef pair<pii,int> ppi;
typedef pair<int,pii> pip;
#define F first
#define S second

const int maxn=400+5,inf=1e9;
int dp[maxn][1<<20],mark[maxn],power[1<<21],p[21][maxn],s[maxn],e[maxn],num[maxn];
vector<int> yal[maxn];
vector<pii> a[maxn];
int n,k,t=0;

pii dfs(int now,int d)
{
    mark[now]=1;
    if(d==k)
    {
        t++;
        num[t]=now;
        //a[k].push_back(pii(t,t));
        return pii(t,t);
    }
    p[d][now]=now;
    for(int i=d-2;i>=0;i--)
        p[i][now]=p[i][p[d-1][now]];
    for(int i=d+1;i<=20;i++)
        p[i][now]=-1;
    int l=inf,r=0;
    int sizeee=yal[now].size();
    for(int i=0;i<sizeee;i++)
    {
        int next=yal[now][i];
        if(mark[next])
            continue;
        p[d][next]=now;
        pii p=dfs(next,d+1);
        l=min(l,p.F);
        r=max(r,p.S);
    }
    if(pii(l,r)!=pii(inf,0))
    {
        s[now]=l;
        e[now]=r;
        //a[d].push_back(pii(l,r));
    }
    return pii(l,r);
}

int32_t main()
{ 
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
    cin>>n>>k;
    for(int i=1;i<n;i++)
    {
        int u,v;
        cin>>u>>v;
        yal[u].push_back(v);
        yal[v].push_back(u);
    }
    if(k*k>=n)
    {
        cout<<"DA"<<endl;
        return 0;
    }
    int pow=1;
    power[1]=0;
    for(int i=1;i<=20;i++)
    {
        pow*=2;
        power[pow]=i;
    }
    dfs(1,0);
    for(int mask=0;mask<(1<<k);mask++)
        dp[0][mask]=1;
    for(int i=1;i<=t;i++)
    {
        //cout<<i<<endl;
        for(int mask=1;mask<(1<<k);mask++)
        {
            //cout<<mask<<endl;
            int mask2=mask;
            int last=(mask&(-mask));
            int hi=power[last];
            if(!hi)
            {
                mask2>>=1;
                last=(mask2&(-mask2));
                hi=power[last];
                hi++;
            }
            int pa=p[hi][num[i]];
            //cout<<i<<' '<<mask<<' '<<last<<' '<<hi<<' '<<pa<<endl;
            if(pa==-1)
                continue;
            if(dp[s[pa]-1][mask-(1<<hi)])
                dp[i][mask]=1;
            //cout<<dp[i][mask]<<endl;
        }
    }
    int f=0;
    for(int mask=1;mask<(1<<k);mask++)
    {
        if(!dp[t][mask])
            continue;
        f=1;
        break;
    }
    if(f)
        cout<<"DA"<<endl;
    else
        cout<<"NE"<<endl;
    return 0;
}

Subtask #1
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 588 KB Output is correct
2 Correct 57 ms 1060 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 2 ms 728 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 1032 KB Output is correct
2 Correct 52 ms 1028 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 49 ms 1092 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 972 KB Output is correct
2 Correct 50 ms 1040 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Incorrect 2 ms 588 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 716 KB Output is correct
2 Correct 59 ms 1044 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 588 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 1028 KB Output is correct
2 Correct 54 ms 1000 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Incorrect 2 ms 716 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 60 ms 1052 KB Output is correct
2 Correct 46 ms 1052 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 588 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 57 ms 1092 KB Output is correct
2 Correct 54 ms 1008 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 45 ms 1092 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 716 KB Output is correct
2 Correct 55 ms 1076 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 588 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #9
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 588 KB Output is correct
2 Correct 55 ms 1064 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Incorrect 1 ms 588 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #10
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 844 KB Output is correct
2 Correct 60 ms 1184 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 21 ms 764 KB Output isn't correct
6 Halted 0 ms 0 KB -