답안 #582846

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
582846	2022-06-24T13:57:26 Z	Neos	Burza (COCI16_burza)	C++14	160 / 160	132 ms	31392 KB

burza

#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using ii = pair<int, int>;

#define fastIO ios::sync_with_stdio(0); cin.tie(0);
#define fi first
#define se second
#define pb push_back
#define numBit(x) (__builtin_popcountll(1ll * (x)))
#define getBit(x, i) ((x) >> (i) & 1)
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        X eps = 1e-9;
        if (x > y + eps) {
            x = y;
            return true;
        } else return false;
    }
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        X eps = 1e-9;
        if (x + eps < y) {
            x = y;
            return true;
        } else return false;
    }

const int N = 4e2 + 7, oo = 1e9 + 7;

int n, k, m, timer, ans, l[N], r[N], dp[N][1 << 20];
vector<int> adj[N];

void euler(int u, int par = -1, int depth = 0) {
    if (depth == k) {
        l[u] = r[u] = ++timer;
        return;
    }
    for (int v: adj[u]) if (v != par) {
        euler(v, u, depth + 1);
        maximize(r[u], r[v]);
        minimize(l[u], l[v]);
    }
}

void dfs(int u, int par = -1, int depth = 0) {
    if (depth >= k) return;
    for (int v: adj[u]) if (v != par) {
        dfs(v, u, depth + 1);
        if (l[v] == oo) continue;
        for (int i = 0; i < (1 << k); i++) if (!getBit(i, depth))
            dp[r[v]][i | (1 << depth)] |= dp[l[v] - 1][i];
    }
}

signed main() {
    fastIO;
//#ifndef ONLINE_JUDGE
//   freopen("test.inp", "r", stdin);
//   freopen("test.out", "w", stdout);
//#endif
    cin >> n >> k;
    if (k * k >= n) { cout << "DA\n"; return 0; }
    for (int i = 0; i < (1 << k); i++) dp[0][i] = 1;
    for (int i = 1; i <= n; i++) l[i] = oo, r[i] = 0;
    for (int i = 0, u, v; i < n - 1; i++) {
        cin >> u >> v;
        adj[u].pb(v); adj[v].pb(u);
    } euler(1), dfs(1);
    cout << (!dp[timer][(1 << k) - 1] ? "NE" : "DA");
}
/*
dp[i][mask] = can you "block out" of the first i "depth-k" nodes just blocking nodes have depth in "mask"
*/

Subtask #1
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	14 ms	4820 KB	Output is correct
2	Correct	124 ms	30792 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	2 ms	2132 KB	Output is correct
6	Correct	1 ms	596 KB	Output is correct

Subtask #2
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	116 ms	27164 KB	Output is correct
2	Correct	116 ms	26684 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	118 ms	27028 KB	Output is correct
6	Correct	2 ms	2388 KB	Output is correct

Subtask #3
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	117 ms	27376 KB	Output is correct
2	Correct	122 ms	27004 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct
5	Correct	1 ms	1620 KB	Output is correct
6	Correct	1 ms	596 KB	Output is correct

Subtask #4
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	31 ms	10700 KB	Output is correct
2	Correct	132 ms	31392 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	1 ms	1364 KB	Output is correct
6	Correct	1 ms	468 KB	Output is correct

Subtask #5
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	114 ms	23540 KB	Output is correct
2	Correct	116 ms	26244 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	2 ms	2132 KB	Output is correct
6	Correct	2 ms	1620 KB	Output is correct

Subtask #6
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	120 ms	28236 KB	Output is correct
2	Correct	121 ms	25388 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	2260 KB	Output is correct
6	Correct	1 ms	1492 KB	Output is correct

Subtask #7
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	127 ms	28160 KB	Output is correct
2	Correct	119 ms	26120 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	111 ms	25348 KB	Output is correct
6	Correct	2 ms	1748 KB	Output is correct

Subtask #8
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	24 ms	8164 KB	Output is correct
2	Correct	123 ms	29524 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	1 ms	1364 KB	Output is correct
6	Correct	2 ms	2260 KB	Output is correct

Subtask #9
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	3656 KB	Output is correct
2	Correct	129 ms	29636 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	1492 KB	Output is correct
6	Correct	2 ms	2052 KB	Output is correct

Subtask #10
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	51 ms	11380 KB	Output is correct
2	Correct	130 ms	29880 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	49 ms	11972 KB	Output is correct
6	Correct	1 ms	1108 KB	Output is correct

답안 #582846

Compilation message