oj.uz

Submission #348758

# Submission time Handle Problem Language Result Execution time Memory
348758 2021-01-15T16:17:01 Z soroush Race (IOI11_race) C++14
21 / 100
 3000 ms 38964 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#include "race.h"
 
using namespace std;
 
typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second
 
const int N = 2e5 + 10;
int S[N], M[N], n, k, ret = 1e9; vector<pii> adj[N]; unordered_map<int, int> mp;
 
void preDFS(int v, int p = -1) {
    S[v] = 1;
    for (pii u : adj[v]) {
        if (u.F != p && !M[u.F]) preDFS(u.F, v), S[v] += S[u.F];
    }
}
 
int centroid(int v, int s, int p = -1) {
    for (pii u : adj[v]) {
        if (!M[u.F] && u.F != p && 2 * S[u.F] > s) return centroid(u.F, s, v);
    }
    return v;
}
 
void add(int v, int iw, int p, int h = 1) {
   if (mp.count(iw)) mp[iw] = min(mp[iw], h);
   else mp[iw] = h;
   for (pii u : adj[v]) {
       if (!M[u.F] && u.F != p) add(u.F, iw + u.S, v, h + 1);
   }
}
 
void calc(int v, int iw, int p, int h = 1) {
    if (iw > k) return;
    if (iw == k) ret = min(ret, h);
    else if (mp.count(k - iw)) ret = min(ret, h + mp[k - iw]);
    for (pii u : adj[v]) {
        if (!M[u.F] && u.F != p) calc(u.F, iw + u.S, v, h + 1);
    }
}
 
void solve(int v) {
    for (pii u : adj[v]) {
      	if (M[u.F]) continue;
        calc(u.F, u.S, v);
        add(u.F, u.S, v);
    }
}
 
void decompose(int v) {
    preDFS(v);
    v = centroid(v, S[v]);
    // solve
    solve(v);
    mp = {};
    M[v] = 1;
    for (pii u : adj[v]) if (!M[u.F]) decompose(u.F);
}
 
int best_path(int _n, int _k, int h[][2], int l[]) {
    n = _n, k = _k;
    for (int i = 0; i < n - 1; i++) {
        int u = h[i][0] + 1, v = h[i][1] + 1;
        adj[u].push_back({v, l[i]});
        adj[v].push_back({u, l[i]});
    }
    decompose(1);
    return ret == 1e9 ? -1 : ret;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 5 ms 5100 KB Output is correct
22 Correct 5 ms 5100 KB Output is correct
23 Correct 5 ms 5100 KB Output is correct
24 Correct 5 ms 5100 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 6 ms 5100 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 6 ms 5100 KB Output is correct
29 Correct 5 ms 5100 KB Output is correct
30 Correct 5 ms 5100 KB Output is correct
31 Correct 5 ms 5100 KB Output is correct
32 Correct 6 ms 5100 KB Output is correct
33 Correct 6 ms 5100 KB Output is correct
34 Correct 6 ms 5100 KB Output is correct
35 Correct 5 ms 5100 KB Output is correct
36 Correct 6 ms 5100 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 214 ms 10788 KB Output is correct
20 Correct 225 ms 10732 KB Output is correct
21 Correct 227 ms 10732 KB Output is correct
22 Correct 201 ms 10732 KB Output is correct
23 Correct 227 ms 10988 KB Output is correct
24 Correct 113 ms 10988 KB Output is correct
25 Correct 406 ms 14572 KB Output is correct
26 Correct 133 ms 17900 KB Output is correct
27 Correct 482 ms 16856 KB Output is correct
28 Execution timed out 3036 ms 38964 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 5 ms 5100 KB Output is correct
22 Correct 5 ms 5100 KB Output is correct
23 Correct 5 ms 5100 KB Output is correct
24 Correct 5 ms 5100 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 6 ms 5100 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 6 ms 5100 KB Output is correct
29 Correct 5 ms 5100 KB Output is correct
30 Correct 5 ms 5100 KB Output is correct
31 Correct 5 ms 5100 KB Output is correct
32 Correct 6 ms 5100 KB Output is correct
33 Correct 6 ms 5100 KB Output is correct
34 Correct 6 ms 5100 KB Output is correct
35 Correct 5 ms 5100 KB Output is correct
36 Correct 6 ms 5100 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 214 ms 10788 KB Output is correct
40 Correct 225 ms 10732 KB Output is correct
41 Correct 227 ms 10732 KB Output is correct
42 Correct 201 ms 10732 KB Output is correct
43 Correct 227 ms 10988 KB Output is correct
44 Correct 113 ms 10988 KB Output is correct
45 Correct 406 ms 14572 KB Output is correct
46 Correct 133 ms 17900 KB Output is correct
47 Correct 482 ms 16856 KB Output is correct
48 Execution timed out 3036 ms 38964 KB Time limit exceeded
49 Halted 0 ms 0 KB -