Submission #97330

#	Time	Username	Problem	Language	Result	Execution time	Memory
97330		luckyboy	Burza (COCI16_burza)	C++14	160 / 160	60 ms	3584 KiB

burza

/**Lucky Boy**/
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for (int i = (a); i >= (b); --i)
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define maxc 1000000007
#define maxn 405
#define maxm 21
#define pii pair <int,int>
#define Task ""
template <typename T> inline void read(T &x){char c;bool nega=0;while((!isdigit(c=getchar()))&&(c!='-'));if(c=='-'){nega=1;c=getchar();}x=c-48;while(isdigit(c=getchar())) x=x*10+c-48;if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10);putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){putchar('-');x=-x;}writep(x);putchar(' ');}
template <typename T> inline void writeln(T x){write(x);putchar('\n');}
using namespace std;
int n,k,st[maxn],en[maxn],leaf,h[maxn];
bool dp[maxn][1 << maxm];
vector <int> a[maxn],b[maxn];
void Dfs(int u,int par)
{
    if (h[u] == k - 1)
    {
        st[u] = leaf++;
        en[u] = leaf;
        return;
    }
    st[u] = leaf;
    for (int v : a[u])
        if (v != par)
        {
            h[v] = h[u] + 1;
            Dfs(v,u);
        }
    en[u] = leaf;
}
int main()
{
    ios_base::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);
    //freopen(Task".inp", "r",stdin);
    //freopens(Task".out", "w",stdout);
    cin >> n >> k;
    if (k * k >= n) return cout << "DA",0;
    FOR(i,1,n-1)
    {
        int x,y;
        cin >> x >> y;
        a[x].pb(y);
        a[y].pb(x);
    }
    h[1] = -1;
    Dfs(1,0);
    FOR(i,2,n) b[st[i]].pb(i);
    dp[0][0] = 1;
    FOR(i,0,leaf - 1)
        FOR(j,0,(1 << k) - 1)
        {
            if (!dp[i][j]) continue;
            for (int v : b[i])
                if ((j >> h[v]) & 1);
                else
                {
                    dp[en[v]][j + (1 << h[v])] = 1;
                }
        }
    FOR(i,0,(1 << k) - 1)
        if (dp[leaf][i])
        {
            return cout << "DA",0;
        }
    cout << "NE";
    return 0;

}

• 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