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답안 #261390

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
261390 2020-08-11T17:03:10 Z dolphingarlic Burza (COCI16_burza) C++14
160 / 160
 201 ms 8288 KB 
#include <bits/stdc++.h>
using namespace std;

int n, k, depth[401], l[401], r[401], cnt = 0;
vector<int> graph[401], to_check[401];
bool dp[401][1 << 20];

void dfs(int node = 1, int parent = 0) {
    if (depth[node] == k) l[node] = r[node] = ++cnt;
    else {
        for (int i : graph[node]) if (i != parent) {
            depth[i] = depth[node] + 1;
            dfs(i, node);
            l[node] = min(l[node], l[i]);
            r[node] = max(r[node], r[i]);
        }
    }
    if (node != 1 && r[node]) to_check[r[node]].push_back(node);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> k;
    if (k * k > n) return cout << "DA", 0;
    for (int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        graph[u].push_back(v);
        graph[v].push_back(u);
    }
    memset(l, 0x3f, sizeof l);
    dfs();
    for (int i = 1; i <= n; i++) depth[i]--;

    dp[0][0] = true;
    for (int i = 1; i <= cnt; i++) {
        for (int j = 0; j < (1 << k); j++) {
            for (int k : to_check[i]) {
                if (j & (1 << depth[k])) {
                    dp[i][j] |= dp[l[k] - 1][j ^ (1 << depth[k])];
                }
            }
        }
    }
    for (int i = 0; i < (1 << k); i++) {
        if (dp[cnt][i]) return cout << "DA", 0;
    }
    cout << "NE";
    return 0;
}

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 1912 KB Output is correct
2 Correct 189 ms 8144 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 1792 KB Output is correct
6 Correct 1 ms 512 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 182 ms 7224 KB Output is correct
2 Correct 179 ms 7064 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 188 ms 7160 KB Output is correct
6 Correct 3 ms 1960 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 7396 KB Output is correct
2 Correct 179 ms 7160 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 1408 KB Output is correct
6 Correct 1 ms 616 KB Output is correct

Subtask #4
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 3448 KB Output is correct
2 Correct 183 ms 8288 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 1280 KB Output is correct
6 Correct 1 ms 512 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 174 ms 6232 KB Output is correct
2 Correct 177 ms 7032 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 1792 KB Output is correct
6 Correct 1 ms 1408 KB Output is correct

Subtask #6
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 180 ms 7544 KB Output is correct
2 Correct 177 ms 6780 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 2 ms 1920 KB Output is correct
6 Correct 1 ms 1280 KB Output is correct

Subtask #7
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 181 ms 7544 KB Output is correct
2 Correct 175 ms 6904 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 177 ms 6776 KB Output is correct
6 Correct 1 ms 1408 KB Output is correct

Subtask #8
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 2688 KB Output is correct
2 Correct 181 ms 7892 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 1152 KB Output is correct
6 Correct 2 ms 1920 KB Output is correct

Subtask #9
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 1444 KB Output is correct
2 Correct 183 ms 7800 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 1280 KB Output is correct
6 Correct 2 ms 1664 KB Output is correct

Subtask #10
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 81 ms 3268 KB Output is correct
2 Correct 201 ms 7928 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 94 ms 3424 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct