oj.uz

Submission #639214

# Submission time Handle Problem Language Result Execution time Memory
639214 2022-09-09T02:26:58 Z BackNoob Cat in a tree (BOI17_catinatree) C++14
51 / 100
 45 ms 22916 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1)
#define TASK "task"
#define sz(s) (int) (s).size()

using namespace std;
const int mxN = 2027;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;

template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}

int n;
int k;
int a[mxN];
int sub[mxN];
int depth[mxN];
int dp[mxN][mxN];
vector<int> adj[mxN];
int res = 0;

void dfs(int u, int p)
{
    dp[u][0] = 1;
    maximize(res, 1);
    int tot = 0;
    for(int v : adj[u]) {
        if(v == p) continue;
        dfs(v, u);
        vector<int> upd(max(depth[u], depth[v] + 1) + 22, 0);
        for(int j = depth[v]; j >= 0; j--) maximize(upd[j + 1], dp[v][j]);
        for(int i = depth[u]; i >= 0; i--) maximize(upd[i], dp[u][i]);
        for(int i = depth[u]; i >= 0; i--) {
            for(int j = depth[v]; j >= 0; j--) {
                if(i + j + 1 >= k)
                    maximize(upd[min(i, j + 1)], dp[u][i] + dp[v][j]);
            }
        }
        maximize(depth[u], depth[v] + 1);
        for(int i = 0; i <= depth[u]; i++) dp[u][i] = upd[i];
    }

    for(int i = 0; i <= n; i++) maximize(res, dp[u][i]);
}


// f[u][i] =

void solve()
{
    cin >> n >> k;
    for(int u = 2; u <= n; u++) {
        int v;
        cin >> v;
        ++v;
        adj[u].pb(v);
        adj[v].pb(u);
    }

    dfs(1, -1);

    cout << res;

}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);


    int tc = 1;
    //cin >> tc;
    while(tc--) {
    	solve();
    }
    return 0;
}

Compilation message

catinatree.cpp: In function 'void dfs(int, int)':
catinatree.cpp:43:9: warning: unused variable 'tot' [-Wunused-variable]
   43 |     int tot = 0;
      |         ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 376 KB Output is correct
5 Correct 0 ms 380 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 376 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 372 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 376 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 376 KB Output is correct
5 Correct 0 ms 380 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 376 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 372 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 376 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 11 ms 10528 KB Output is correct
22 Correct 2 ms 2296 KB Output is correct
23 Correct 2 ms 2300 KB Output is correct
24 Correct 2 ms 2388 KB Output is correct
25 Correct 3 ms 4436 KB Output is correct
26 Correct 3 ms 4436 KB Output is correct
27 Correct 3 ms 4344 KB Output is correct
28 Correct 6 ms 6356 KB Output is correct
29 Correct 6 ms 6356 KB Output is correct
30 Correct 5 ms 6476 KB Output is correct
31 Correct 6 ms 6356 KB Output is correct
32 Correct 5 ms 6268 KB Output is correct
33 Correct 6 ms 6228 KB Output is correct
34 Correct 5 ms 5972 KB Output is correct
35 Correct 6 ms 6016 KB Output is correct
36 Correct 5 ms 6356 KB Output is correct
37 Correct 6 ms 6484 KB Output is correct
38 Correct 6 ms 6652 KB Output is correct
39 Correct 7 ms 7032 KB Output is correct
40 Correct 9 ms 10492 KB Output is correct

Subtask #3
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 376 KB Output is correct
5 Correct 0 ms 380 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 376 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 372 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 376 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 11 ms 10528 KB Output is correct
22 Correct 2 ms 2296 KB Output is correct
23 Correct 2 ms 2300 KB Output is correct
24 Correct 2 ms 2388 KB Output is correct
25 Correct 3 ms 4436 KB Output is correct
26 Correct 3 ms 4436 KB Output is correct
27 Correct 3 ms 4344 KB Output is correct
28 Correct 6 ms 6356 KB Output is correct
29 Correct 6 ms 6356 KB Output is correct
30 Correct 5 ms 6476 KB Output is correct
31 Correct 6 ms 6356 KB Output is correct
32 Correct 5 ms 6268 KB Output is correct
33 Correct 6 ms 6228 KB Output is correct
34 Correct 5 ms 5972 KB Output is correct
35 Correct 6 ms 6016 KB Output is correct
36 Correct 5 ms 6356 KB Output is correct
37 Correct 6 ms 6484 KB Output is correct
38 Correct 6 ms 6652 KB Output is correct
39 Correct 7 ms 7032 KB Output is correct
40 Correct 9 ms 10492 KB Output is correct
41 Runtime error 45 ms 22916 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -