oj.uz

Submission #1000784

# Submission time Handle Problem Language Result Execution time Memory
1000784 2024-06-18T08:43:52 Z saayan007 Race (IOI11_race) C++17
100 / 100
 265 ms 32616 KB 
#include "race.h"
#include "bits/stdc++.h"
using namespace std;
 
const int mxN = 2e5L + 10;
const int mxK = 1e6L + 10;
int n, k;
vector<pair<int, int>> adj[mxN];
int ans = mxN;
int sz[mxN];
bool proc[mxN] = {};
int dp[mxK];
 
int get_sz(int x, int p) {
    sz[x] = 1;
    for(auto [y, w] : adj[x]) {
        if(proc[y] || y == p) continue;
        sz[x] += get_sz(y, x);
    }
    return sz[x];
}
 
int get_cen(int x, int p, int tot) {
    for(auto [y, w] : adj[x]) {
        if(proc[y] || y == p || sz[y] * 2 <= tot) continue;
        return get_cen(y, x, tot);
    }
    return x;
}
 
void dfs(int x, int p, int dep, int dis, int flag) {
    if(dis > k) return;
    if(flag == 0) {
        if(dp[k - dis] != mxN) ans = min(ans, dep + dp[k - dis]);
    }
    else if(flag == 1) {
        dp[dis] = min(dp[dis], dep);
    }
    else if(flag == 2) {
        dp[dis] = mxN;
    }
 
    for(auto [y, w] : adj[x]) {
        if(proc[y] || y == p) continue;
        dfs(y, x, dep + 1, dis + w, flag);
    }
}
 
void solve(int x = 1, int p = -1) {
    int c = get_cen(x, p, get_sz(x, p));
    dp[0] = 0;
    for(auto [d, w] : adj[c]) {
        if(proc[d]) continue;
        dfs(d, c, 1, w, 0);
        dfs(d, c, 1, w, 1);
    }
    for(auto [d, w] : adj[c]) {
        if(proc[d]) continue;
        dfs(d, c, 1, w, 2);
    }
    dp[0] = mxN;
    proc[c] = 1;
    for(auto [d, w] : adj[c]) {
        if(proc[d]) continue;
        solve(d, c);
    }
}
 
int best_path(int N, int K, int H[][2], int L[])
{
    /* rep(i, 0, mxK - 1) dp[i] = mxN; */
    for(int i = 0; i < mxK; ++i) dp[i] = mxN;
    n = N; k = K;
    /* rep(i, 0, n - 2) { */
    for(int i = 0; i < n - 1; ++i) {
        adj[H[i][0] + 1].emplace_back(H[i][1] + 1, L[i]);
        adj[H[i][1] + 1].emplace_back(H[i][0] + 1, L[i]);
    }
 
    solve();
    return (ans > n - 1 ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 9308 KB Output is correct
2 Correct 3 ms 9308 KB Output is correct
3 Correct 3 ms 9308 KB Output is correct
4 Correct 3 ms 9304 KB Output is correct
5 Correct 4 ms 9308 KB Output is correct
6 Correct 4 ms 9308 KB Output is correct
7 Correct 3 ms 9308 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 3 ms 9308 KB Output is correct
10 Correct 3 ms 9308 KB Output is correct
11 Correct 3 ms 9308 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 3 ms 9388 KB Output is correct
14 Correct 3 ms 9308 KB Output is correct
15 Correct 3 ms 9308 KB Output is correct
16 Correct 3 ms 9308 KB Output is correct
17 Correct 4 ms 9308 KB Output is correct
18 Correct 3 ms 9308 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 9308 KB Output is correct
2 Correct 3 ms 9308 KB Output is correct
3 Correct 3 ms 9308 KB Output is correct
4 Correct 3 ms 9304 KB Output is correct
5 Correct 4 ms 9308 KB Output is correct
6 Correct 4 ms 9308 KB Output is correct
7 Correct 3 ms 9308 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 3 ms 9308 KB Output is correct
10 Correct 3 ms 9308 KB Output is correct
11 Correct 3 ms 9308 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 3 ms 9388 KB Output is correct
14 Correct 3 ms 9308 KB Output is correct
15 Correct 3 ms 9308 KB Output is correct
16 Correct 3 ms 9308 KB Output is correct
17 Correct 4 ms 9308 KB Output is correct
18 Correct 3 ms 9308 KB Output is correct
19 Correct 3 ms 9304 KB Output is correct
20 Correct 3 ms 9308 KB Output is correct
21 Correct 3 ms 9308 KB Output is correct
22 Correct 4 ms 9308 KB Output is correct
23 Correct 3 ms 10952 KB Output is correct
24 Correct 3 ms 10844 KB Output is correct
25 Correct 4 ms 9308 KB Output is correct
26 Correct 4 ms 9308 KB Output is correct
27 Correct 3 ms 9308 KB Output is correct
28 Correct 4 ms 9308 KB Output is correct
29 Correct 3 ms 9308 KB Output is correct
30 Correct 4 ms 9304 KB Output is correct
31 Correct 3 ms 10844 KB Output is correct
32 Correct 3 ms 10844 KB Output is correct
33 Correct 4 ms 9308 KB Output is correct
34 Correct 3 ms 9308 KB Output is correct
35 Correct 4 ms 9308 KB Output is correct
36 Correct 4 ms 9308 KB Output is correct
37 Correct 3 ms 10844 KB Output is correct
38 Correct 3 ms 9204 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 9308 KB Output is correct
2 Correct 3 ms 9308 KB Output is correct
3 Correct 3 ms 9308 KB Output is correct
4 Correct 3 ms 9304 KB Output is correct
5 Correct 4 ms 9308 KB Output is correct
6 Correct 4 ms 9308 KB Output is correct
7 Correct 3 ms 9308 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 3 ms 9308 KB Output is correct
10 Correct 3 ms 9308 KB Output is correct
11 Correct 3 ms 9308 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 3 ms 9388 KB Output is correct
14 Correct 3 ms 9308 KB Output is correct
15 Correct 3 ms 9308 KB Output is correct
16 Correct 3 ms 9308 KB Output is correct
17 Correct 4 ms 9308 KB Output is correct
18 Correct 3 ms 9308 KB Output is correct
19 Correct 82 ms 14672 KB Output is correct
20 Correct 79 ms 15700 KB Output is correct
21 Correct 92 ms 16976 KB Output is correct
22 Correct 79 ms 15884 KB Output is correct
23 Correct 42 ms 16220 KB Output is correct
24 Correct 34 ms 15952 KB Output is correct
25 Correct 79 ms 18516 KB Output is correct
26 Correct 69 ms 22608 KB Output is correct
27 Correct 92 ms 21284 KB Output is correct
28 Correct 140 ms 32616 KB Output is correct
29 Correct 140 ms 32084 KB Output is correct
30 Correct 91 ms 21976 KB Output is correct
31 Correct 99 ms 21900 KB Output is correct
32 Correct 105 ms 21840 KB Output is correct
33 Correct 121 ms 21020 KB Output is correct
34 Correct 101 ms 22888 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 9308 KB Output is correct
2 Correct 3 ms 9308 KB Output is correct
3 Correct 3 ms 9308 KB Output is correct
4 Correct 3 ms 9304 KB Output is correct
5 Correct 4 ms 9308 KB Output is correct
6 Correct 4 ms 9308 KB Output is correct
7 Correct 3 ms 9308 KB Output is correct
8 Correct 4 ms 9308 KB Output is correct
9 Correct 3 ms 9308 KB Output is correct
10 Correct 3 ms 9308 KB Output is correct
11 Correct 3 ms 9308 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 3 ms 9388 KB Output is correct
14 Correct 3 ms 9308 KB Output is correct
15 Correct 3 ms 9308 KB Output is correct
16 Correct 3 ms 9308 KB Output is correct
17 Correct 4 ms 9308 KB Output is correct
18 Correct 3 ms 9308 KB Output is correct
19 Correct 3 ms 9304 KB Output is correct
20 Correct 3 ms 9308 KB Output is correct
21 Correct 3 ms 9308 KB Output is correct
22 Correct 4 ms 9308 KB Output is correct
23 Correct 3 ms 10952 KB Output is correct
24 Correct 3 ms 10844 KB Output is correct
25 Correct 4 ms 9308 KB Output is correct
26 Correct 4 ms 9308 KB Output is correct
27 Correct 3 ms 9308 KB Output is correct
28 Correct 4 ms 9308 KB Output is correct
29 Correct 3 ms 9308 KB Output is correct
30 Correct 4 ms 9304 KB Output is correct
31 Correct 3 ms 10844 KB Output is correct
32 Correct 3 ms 10844 KB Output is correct
33 Correct 4 ms 9308 KB Output is correct
34 Correct 3 ms 9308 KB Output is correct
35 Correct 4 ms 9308 KB Output is correct
36 Correct 4 ms 9308 KB Output is correct
37 Correct 3 ms 10844 KB Output is correct
38 Correct 3 ms 9204 KB Output is correct
39 Correct 82 ms 14672 KB Output is correct
40 Correct 79 ms 15700 KB Output is correct
41 Correct 92 ms 16976 KB Output is correct
42 Correct 79 ms 15884 KB Output is correct
43 Correct 42 ms 16220 KB Output is correct
44 Correct 34 ms 15952 KB Output is correct
45 Correct 79 ms 18516 KB Output is correct
46 Correct 69 ms 22608 KB Output is correct
47 Correct 92 ms 21284 KB Output is correct
48 Correct 140 ms 32616 KB Output is correct
49 Correct 140 ms 32084 KB Output is correct
50 Correct 91 ms 21976 KB Output is correct
51 Correct 99 ms 21900 KB Output is correct
52 Correct 105 ms 21840 KB Output is correct
53 Correct 121 ms 21020 KB Output is correct
54 Correct 101 ms 22888 KB Output is correct
55 Correct 9 ms 9820 KB Output is correct
56 Correct 9 ms 9932 KB Output is correct
57 Correct 51 ms 14940 KB Output is correct
58 Correct 23 ms 17612 KB Output is correct
59 Correct 73 ms 21076 KB Output is correct
60 Correct 247 ms 32212 KB Output is correct
61 Correct 101 ms 21328 KB Output is correct
62 Correct 133 ms 21872 KB Output is correct
63 Correct 136 ms 23500 KB Output is correct
64 Correct 265 ms 22096 KB Output is correct
65 Correct 100 ms 24408 KB Output is correct
66 Correct 205 ms 29960 KB Output is correct
67 Correct 56 ms 25024 KB Output is correct
68 Correct 128 ms 22384 KB Output is correct
69 Correct 119 ms 20244 KB Output is correct
70 Correct 112 ms 23868 KB Output is correct