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Submission #895966

# Submission time Handle Problem Language Result Execution time Memory
895966 2023-12-31T08:49:37 Z niter Cat Exercise (JOI23_ho_t4) C++14
31 / 100
 2000 ms 29656 KB 
#include <bits/stdc++.h>
#define loop(i,a,b) for(int i = (a); i < (b); i ++)
#define pb push_back
#define ins insert
#define pii pair<int,int>
#define ff first
#define ss second
#define op(x) cerr << #x << " = " << x << endl;
#define opa(x) cerr << #x << " = " << x << ", ";
#define spac cerr << ' ';
#define entr cerr << endl;
#define STL(x) cerr << #x << " : "; for(auto &qwe:x) cerr << qwe << ' '; cerr << endl;
#define ARR(x, nnn) cerr << #x << " : "; loop(qwe,0,nnn) cerr << x[qwe] << ' '; cerr << endl;
#define bye exit(0);
using namespace std;
mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count());
inline int rng(int l, int r){ return uniform_int_distribution<int>(l, r)(RNG); }
ostream& operator<<(ostream& os, pii A){ os << "[" << A.ff << ", " << A.ss << "]"; }

const int mxn = (int)(2e5) + 10;

int a[mxn];
vector<int> E[mxn];

bool took[mxn];
long long dp[mxn];
void find_max(int v, int par, int dis, int& pos_dis, int& pos, int& mx){
    if(a[v] > mx){
        mx = a[v];
        pos = v;
        pos_dis = dis;
    }
    for(auto &i:E[v]){
        if(i == par) continue;
        if(!took[i]){
            find_max(i, v, dis + 1, pos_dis, pos, mx);
        }
    }
}

void dfs(int v){
    took[v] = true;
    for(auto &i:E[v]){
        if(!took[i]){
            int mx_pos, mx_val = -999, det;
            find_max(i, v, 1, det, mx_pos, mx_val);
            dfs(mx_pos);
            dp[v] = max(dp[v], dp[mx_pos] + det);
        }
    }
}

int main(){
    ios::sync_with_stdio(false); cin.tie(0);
    int n; cin >> n;
    loop(i,0,n) cin >> a[i];
    int st;
    loop(i,0,n) if(a[i] == n) st = i;
    loop(i,0,n-1){
        int u, v;
        cin >> u >> v;
        u--; v--;
        E[u].pb(v);
        E[v].pb(u);
    }
    dfs(st);
    cout << dp[st] << '\n';
}
/*
5
1 5 3 4 5
*/

Compilation message

Main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::pair<int, int>)':
Main.cpp:18:84: warning: no return statement in function returning non-void [-Wreturn-type]
   18 | ostream& operator<<(ostream& os, pii A){ os << "[" << A.ff << ", " << A.ss << "]"; }
      |                                                                                    ^
Main.cpp: In function 'int main()':
Main.cpp:67:18: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized]
   67 |     cout << dp[st] << '\n';
      |                  ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6784 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 7256 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6784 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 7256 KB Output is correct
18 Correct 87 ms 7260 KB Output is correct
19 Correct 79 ms 7256 KB Output is correct
20 Correct 94 ms 7300 KB Output is correct
21 Correct 3 ms 7256 KB Output is correct
22 Correct 3 ms 7004 KB Output is correct
23 Correct 4 ms 7004 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6784 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 7256 KB Output is correct
18 Correct 87 ms 7260 KB Output is correct
19 Correct 79 ms 7256 KB Output is correct
20 Correct 94 ms 7300 KB Output is correct
21 Correct 3 ms 7256 KB Output is correct
22 Correct 3 ms 7004 KB Output is correct
23 Correct 4 ms 7004 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct
25 Correct 2 ms 6748 KB Output is correct
26 Correct 84 ms 7248 KB Output is correct
27 Correct 85 ms 7760 KB Output is correct
28 Correct 86 ms 7288 KB Output is correct
29 Correct 83 ms 7300 KB Output is correct
30 Correct 7 ms 7032 KB Output is correct
31 Correct 11 ms 7012 KB Output is correct
32 Correct 7 ms 7052 KB Output is correct
33 Correct 11 ms 7060 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6784 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 7256 KB Output is correct
18 Correct 87 ms 7260 KB Output is correct
19 Correct 79 ms 7256 KB Output is correct
20 Correct 94 ms 7300 KB Output is correct
21 Correct 3 ms 7256 KB Output is correct
22 Correct 3 ms 7004 KB Output is correct
23 Correct 4 ms 7004 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct
25 Execution timed out 2051 ms 29656 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6748 KB Output is correct
3 Execution timed out 2054 ms 17596 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6784 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 7256 KB Output is correct
18 Correct 87 ms 7260 KB Output is correct
19 Correct 79 ms 7256 KB Output is correct
20 Correct 94 ms 7300 KB Output is correct
21 Correct 3 ms 7256 KB Output is correct
22 Correct 3 ms 7004 KB Output is correct
23 Correct 4 ms 7004 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct
25 Correct 2 ms 6748 KB Output is correct
26 Correct 84 ms 7248 KB Output is correct
27 Correct 85 ms 7760 KB Output is correct
28 Correct 86 ms 7288 KB Output is correct
29 Correct 83 ms 7300 KB Output is correct
30 Correct 7 ms 7032 KB Output is correct
31 Correct 11 ms 7012 KB Output is correct
32 Correct 7 ms 7052 KB Output is correct
33 Correct 11 ms 7060 KB Output is correct
34 Execution timed out 2051 ms 29656 KB Time limit exceeded
35 Halted 0 ms 0 KB -