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답안 #743913

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
743913 2023-05-18T06:05:39 Z maomao90 Wells (CEOI21_wells) C++17
0 / 100
 23 ms 35668 KB 
// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 1500005;
const int MOD = 1000000007;

int n, k;
vi adj[MAXN];

int d[MAXN], mxd[MAXN];
bool pos;
bool dfs(int u, int p) {
    mxd[u] = d[u];
    bool res = d[u] % k == 0;
    int cnt = 0;
    int mx = -INF, smx = -INF, cmx = -INF, csmx = -INF;
    for (int v : adj[u]) {
        if (v == p) {
            continue;
        }
        d[v] = d[u] + 1;
        bool tmp = dfs(v, u);
        if (!pos) {
            return 0;
        }
        res |= tmp;
        cnt += tmp;
        mxto(mxd[u], mxd[v]);
        int x = mxd[v] - d[u];
        if (tmp) {
            x = k - d[u] % k - 1;
        }
        if (x >= mx) {
            smx = mx;
            mx = x;
        } else {
            mxto(smx, x);
        }
        if (tmp) {
            if (mxd[v] >= cmx) {
                csmx = cmx;
                cmx = mxd[v];
            } else {
                mxto(csmx, mxd[v]);
            }
        }
    }
    if (cnt >= 2 && 2 * d[u] % k != 0 && cmx + csmx - 2 * d[u] + 1 >= k) {
        pos = 0;
        return 0;
    }
    if (d[u] % k != 0 && mx + smx + 1 >= k) {
        pos = 0;
        return 0;
    }
    return res;
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n >> k;
    REP (i, 1, n) {
        int u, v; cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    REP (i, 1, n + 1) {
        d[i] = 0;
        pos = 1;
        dfs(i, -1);
        if (pos) {
            cerr << i << '\n';
            cout << "YES\n";
            cout << 0 << '\n';
            return 0;
        }
    }
    cout << "NO\n";
    cout << 0 << '\n';
    return 0;
}

Subtask #1
0.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 18 ms 35496 KB Output is partially correct
2 Partially correct 18 ms 35540 KB Output is partially correct
3 Partially correct 18 ms 35564 KB Output is partially correct
4 Partially correct 18 ms 35540 KB Output is partially correct
5 Partially correct 19 ms 35540 KB Output is partially correct
6 Partially correct 18 ms 35568 KB Output is partially correct
7 Correct 19 ms 35456 KB Output is correct
8 Partially correct 18 ms 35540 KB Output is partially correct
9 Partially correct 17 ms 35524 KB Output is partially correct
10 Correct 18 ms 35540 KB Output is correct
11 Partially correct 18 ms 35492 KB Output is partially correct
12 Partially correct 17 ms 35500 KB Output is partially correct
13 Partially correct 18 ms 35552 KB Output is partially correct
14 Partially correct 20 ms 35460 KB Output is partially correct
15 Partially correct 17 ms 35540 KB Output is partially correct
16 Partially correct 17 ms 35540 KB Output is partially correct
17 Partially correct 17 ms 35556 KB Output is partially correct
18 Partially correct 17 ms 35532 KB Output is partially correct
19 Partially correct 18 ms 35552 KB Output is partially correct
20 Correct 19 ms 35548 KB Output is correct
21 Partially correct 18 ms 35552 KB Output is partially correct
22 Partially correct 18 ms 35540 KB Output is partially correct
23 Partially correct 17 ms 35540 KB Output is partially correct
24 Partially correct 18 ms 35572 KB Output is partially correct
25 Partially correct 18 ms 35504 KB Output is partially correct
26 Partially correct 21 ms 35540 KB Output is partially correct
27 Partially correct 23 ms 35536 KB Output is partially correct
28 Correct 17 ms 35472 KB Output is correct
29 Partially correct 21 ms 35540 KB Output is partially correct
30 Partially correct 18 ms 35540 KB Output is partially correct
31 Partially correct 19 ms 35552 KB Output is partially correct
32 Correct 19 ms 35460 KB Output is correct
33 Partially correct 18 ms 35492 KB Output is partially correct
34 Correct 20 ms 35496 KB Output is correct
35 Partially correct 19 ms 35668 KB Output is partially correct
36 Partially correct 18 ms 35504 KB Output is partially correct
37 Partially correct 20 ms 35504 KB Output is partially correct
38 Partially correct 20 ms 35540 KB Output is partially correct
39 Partially correct 20 ms 35540 KB Output is partially correct
40 Partially correct 18 ms 35540 KB Output is partially correct
41 Partially correct 18 ms 35452 KB Output is partially correct
42 Partially correct 18 ms 35524 KB Output is partially correct
43 Partially correct 21 ms 35468 KB Output is partially correct
44 Correct 23 ms 35452 KB Output is correct
45 Partially correct 18 ms 35568 KB Output is partially correct
46 Partially correct 18 ms 35540 KB Output is partially correct
47 Partially correct 19 ms 35552 KB Output is partially correct
48 Partially correct 18 ms 35548 KB Output is partially correct
49 Incorrect 19 ms 35540 KB Output isn't correct
50 Halted 0 ms 0 KB -

Subtask #2
0.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 18 ms 35496 KB Output is partially correct
2 Partially correct 18 ms 35540 KB Output is partially correct
3 Partially correct 18 ms 35564 KB Output is partially correct
4 Partially correct 18 ms 35540 KB Output is partially correct
5 Partially correct 19 ms 35540 KB Output is partially correct
6 Partially correct 18 ms 35568 KB Output is partially correct
7 Correct 19 ms 35456 KB Output is correct
8 Partially correct 18 ms 35540 KB Output is partially correct
9 Partially correct 17 ms 35524 KB Output is partially correct
10 Correct 18 ms 35540 KB Output is correct
11 Partially correct 18 ms 35492 KB Output is partially correct
12 Partially correct 17 ms 35500 KB Output is partially correct
13 Partially correct 18 ms 35552 KB Output is partially correct
14 Partially correct 20 ms 35460 KB Output is partially correct
15 Partially correct 17 ms 35540 KB Output is partially correct
16 Partially correct 17 ms 35540 KB Output is partially correct
17 Partially correct 17 ms 35556 KB Output is partially correct
18 Partially correct 17 ms 35532 KB Output is partially correct
19 Partially correct 18 ms 35552 KB Output is partially correct
20 Correct 19 ms 35548 KB Output is correct
21 Partially correct 18 ms 35552 KB Output is partially correct
22 Partially correct 18 ms 35540 KB Output is partially correct
23 Partially correct 17 ms 35540 KB Output is partially correct
24 Partially correct 18 ms 35572 KB Output is partially correct
25 Partially correct 18 ms 35504 KB Output is partially correct
26 Partially correct 21 ms 35540 KB Output is partially correct
27 Partially correct 23 ms 35536 KB Output is partially correct
28 Correct 17 ms 35472 KB Output is correct
29 Partially correct 21 ms 35540 KB Output is partially correct
30 Partially correct 18 ms 35540 KB Output is partially correct
31 Partially correct 19 ms 35552 KB Output is partially correct
32 Correct 19 ms 35460 KB Output is correct
33 Partially correct 18 ms 35492 KB Output is partially correct
34 Correct 20 ms 35496 KB Output is correct
35 Partially correct 19 ms 35668 KB Output is partially correct
36 Partially correct 18 ms 35504 KB Output is partially correct
37 Partially correct 20 ms 35504 KB Output is partially correct
38 Partially correct 20 ms 35540 KB Output is partially correct
39 Partially correct 20 ms 35540 KB Output is partially correct
40 Partially correct 18 ms 35540 KB Output is partially correct
41 Partially correct 18 ms 35452 KB Output is partially correct
42 Partially correct 18 ms 35524 KB Output is partially correct
43 Partially correct 21 ms 35468 KB Output is partially correct
44 Correct 23 ms 35452 KB Output is correct
45 Partially correct 18 ms 35568 KB Output is partially correct
46 Partially correct 18 ms 35540 KB Output is partially correct
47 Partially correct 19 ms 35552 KB Output is partially correct
48 Partially correct 18 ms 35548 KB Output is partially correct
49 Incorrect 19 ms 35540 KB Output isn't correct
50 Halted 0 ms 0 KB -

Subtask #3
0.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 18 ms 35496 KB Output is partially correct
2 Partially correct 18 ms 35540 KB Output is partially correct
3 Partially correct 18 ms 35564 KB Output is partially correct
4 Partially correct 18 ms 35540 KB Output is partially correct
5 Partially correct 19 ms 35540 KB Output is partially correct
6 Partially correct 18 ms 35568 KB Output is partially correct
7 Correct 19 ms 35456 KB Output is correct
8 Partially correct 18 ms 35540 KB Output is partially correct
9 Partially correct 17 ms 35524 KB Output is partially correct
10 Correct 18 ms 35540 KB Output is correct
11 Partially correct 18 ms 35492 KB Output is partially correct
12 Partially correct 17 ms 35500 KB Output is partially correct
13 Partially correct 18 ms 35552 KB Output is partially correct
14 Partially correct 20 ms 35460 KB Output is partially correct
15 Partially correct 17 ms 35540 KB Output is partially correct
16 Partially correct 17 ms 35540 KB Output is partially correct
17 Partially correct 17 ms 35556 KB Output is partially correct
18 Partially correct 17 ms 35532 KB Output is partially correct
19 Partially correct 18 ms 35552 KB Output is partially correct
20 Correct 19 ms 35548 KB Output is correct
21 Partially correct 18 ms 35552 KB Output is partially correct
22 Partially correct 18 ms 35540 KB Output is partially correct
23 Partially correct 17 ms 35540 KB Output is partially correct
24 Partially correct 18 ms 35572 KB Output is partially correct
25 Partially correct 18 ms 35504 KB Output is partially correct
26 Partially correct 21 ms 35540 KB Output is partially correct
27 Partially correct 23 ms 35536 KB Output is partially correct
28 Correct 17 ms 35472 KB Output is correct
29 Partially correct 21 ms 35540 KB Output is partially correct
30 Partially correct 18 ms 35540 KB Output is partially correct
31 Partially correct 19 ms 35552 KB Output is partially correct
32 Correct 19 ms 35460 KB Output is correct
33 Partially correct 18 ms 35492 KB Output is partially correct
34 Correct 20 ms 35496 KB Output is correct
35 Partially correct 19 ms 35668 KB Output is partially correct
36 Partially correct 18 ms 35504 KB Output is partially correct
37 Partially correct 20 ms 35504 KB Output is partially correct
38 Partially correct 20 ms 35540 KB Output is partially correct
39 Partially correct 20 ms 35540 KB Output is partially correct
40 Partially correct 18 ms 35540 KB Output is partially correct
41 Partially correct 18 ms 35452 KB Output is partially correct
42 Partially correct 18 ms 35524 KB Output is partially correct
43 Partially correct 21 ms 35468 KB Output is partially correct
44 Correct 23 ms 35452 KB Output is correct
45 Partially correct 18 ms 35568 KB Output is partially correct
46 Partially correct 18 ms 35540 KB Output is partially correct
47 Partially correct 19 ms 35552 KB Output is partially correct
48 Partially correct 18 ms 35548 KB Output is partially correct
49 Incorrect 19 ms 35540 KB Output isn't correct
50 Halted 0 ms 0 KB -

Subtask #4
0.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 18 ms 35496 KB Output is partially correct
2 Partially correct 18 ms 35540 KB Output is partially correct
3 Partially correct 18 ms 35564 KB Output is partially correct
4 Partially correct 18 ms 35540 KB Output is partially correct
5 Partially correct 19 ms 35540 KB Output is partially correct
6 Partially correct 18 ms 35568 KB Output is partially correct
7 Correct 19 ms 35456 KB Output is correct
8 Partially correct 18 ms 35540 KB Output is partially correct
9 Partially correct 17 ms 35524 KB Output is partially correct
10 Correct 18 ms 35540 KB Output is correct
11 Partially correct 18 ms 35492 KB Output is partially correct
12 Partially correct 17 ms 35500 KB Output is partially correct
13 Partially correct 18 ms 35552 KB Output is partially correct
14 Partially correct 20 ms 35460 KB Output is partially correct
15 Partially correct 17 ms 35540 KB Output is partially correct
16 Partially correct 17 ms 35540 KB Output is partially correct
17 Partially correct 17 ms 35556 KB Output is partially correct
18 Partially correct 17 ms 35532 KB Output is partially correct
19 Partially correct 18 ms 35552 KB Output is partially correct
20 Correct 19 ms 35548 KB Output is correct
21 Partially correct 18 ms 35552 KB Output is partially correct
22 Partially correct 18 ms 35540 KB Output is partially correct
23 Partially correct 17 ms 35540 KB Output is partially correct
24 Partially correct 18 ms 35572 KB Output is partially correct
25 Partially correct 18 ms 35504 KB Output is partially correct
26 Partially correct 21 ms 35540 KB Output is partially correct
27 Partially correct 23 ms 35536 KB Output is partially correct
28 Correct 17 ms 35472 KB Output is correct
29 Partially correct 21 ms 35540 KB Output is partially correct
30 Partially correct 18 ms 35540 KB Output is partially correct
31 Partially correct 19 ms 35552 KB Output is partially correct
32 Correct 19 ms 35460 KB Output is correct
33 Partially correct 18 ms 35492 KB Output is partially correct
34 Correct 20 ms 35496 KB Output is correct
35 Partially correct 19 ms 35668 KB Output is partially correct
36 Partially correct 18 ms 35504 KB Output is partially correct
37 Partially correct 20 ms 35504 KB Output is partially correct
38 Partially correct 20 ms 35540 KB Output is partially correct
39 Partially correct 20 ms 35540 KB Output is partially correct
40 Partially correct 18 ms 35540 KB Output is partially correct
41 Partially correct 18 ms 35452 KB Output is partially correct
42 Partially correct 18 ms 35524 KB Output is partially correct
43 Partially correct 21 ms 35468 KB Output is partially correct
44 Correct 23 ms 35452 KB Output is correct
45 Partially correct 18 ms 35568 KB Output is partially correct
46 Partially correct 18 ms 35540 KB Output is partially correct
47 Partially correct 19 ms 35552 KB Output is partially correct
48 Partially correct 18 ms 35548 KB Output is partially correct
49 Incorrect 19 ms 35540 KB Output isn't correct
50 Halted 0 ms 0 KB -