oj.uz

Submission #694544

# Submission time Handle Problem Language Result Execution time Memory
694544 2023-02-04T06:16:42 Z ac2hu Race (IOI11_race) C++14
100 / 100
 436 ms 77464 KB 
#include <bits/stdc++.h>
using namespace std;
#include "race.h"
#define int long long 
const int MX = 2e5 + 10;
int n, k, ans = 1e9, timer = 0, tin[MX], tout[MX], rev[MX], d[MX], ed[MX], siz[MX], bigc[MX];
vector<pair<int,int>> adj[MX];
map<int, int> mnedge;
void dfs2(int v,int p, bool keep){// keep
    for(auto [e, w] : adj[v]){
        if(p != e && bigc[v] != e)dfs2(e, v, false);
    }
    if(bigc[v] != -1)dfs2(bigc[v], v, true);
    mnedge[d[v]] = ed[v];
    if(mnedge.find(d[v] + k) != mnedge.end())
        ans = min(ans, mnedge[d[v] + k] - ed[v]);
    for(auto [e, w] : adj[v]){
        if(e == p || e == bigc[v])continue;
        for(int st = tin[e];st<=tout[e];st++){
            int node = rev[st];
            int c = k + 2*d[v] - d[node];
            if(mnedge.find(c) != mnedge.end())ans = min(ans, mnedge[c] + ed[node] - 2*ed[v]);
        }
        for(int st = tin[e];st<=tout[e];st++){
            if(mnedge[d[rev[st]]] == 0)
                mnedge[d[rev[st]]] = ed[rev[st]];
            else 
                mnedge[d[rev[st]]] = min(mnedge[d[rev[st]]], ed[rev[st]]);
        }
    }
    if(!keep){
        mnedge.clear();
    }
}
void dfs1(int v,int p){
    int mx = -1;
    rev[++timer] = v;
    tin[v] = timer;
    bigc[v] = -1;
    siz[v] = 1;
    for(auto [e, w] : adj[v]){
        if(e == p)continue;
        d[e] = d[v] + w;
        ed[e] = ed[v] + 1;
        dfs1(e, v);
        if(siz[e] > mx){
            bigc[v] = e;
            mx = siz[e];
        }
        siz[v] += siz[e];
    }
    tout[v] = timer;
}
#undef int
int best_path(int N, int K, int H[][2], int L[]){
    n = N, k = K;
    for(int i = 0;i + 1<n;i++){
        int a = H[i][0], b = H[i][1], c = L[i];
        adj[a].push_back({b, c});
        adj[b].push_back({a, c});
    }
    dfs1(0, -1);
    dfs2(0, -1, true);
    if(ans > 1e8)
        return -1;
    return ans;
}
// signed main() {
//     iostream::sync_with_stdio(0);cin.tie(0);
// }

Compilation message

race.cpp: In function 'void dfs2(long long int, long long int, bool)':
race.cpp:10:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   10 |     for(auto [e, w] : adj[v]){
      |              ^
race.cpp:17:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   17 |     for(auto [e, w] : adj[v]){
      |              ^
race.cpp: In function 'void dfs1(long long int, long long int)':
race.cpp:41:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |     for(auto [e, w] : adj[v]){
      |              ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5076 KB Output is correct
2 Correct 3 ms 5096 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 2 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 2 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5076 KB Output is correct
18 Correct 3 ms 5076 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5076 KB Output is correct
2 Correct 3 ms 5096 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 2 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 2 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5076 KB Output is correct
18 Correct 3 ms 5076 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 2 ms 5076 KB Output is correct
21 Correct 3 ms 5204 KB Output is correct
22 Correct 3 ms 5204 KB Output is correct
23 Correct 4 ms 5204 KB Output is correct
24 Correct 3 ms 5204 KB Output is correct
25 Correct 4 ms 5204 KB Output is correct
26 Correct 4 ms 5204 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 4 ms 5204 KB Output is correct
29 Correct 4 ms 5204 KB Output is correct
30 Correct 3 ms 5188 KB Output is correct
31 Correct 3 ms 5204 KB Output is correct
32 Correct 3 ms 5204 KB Output is correct
33 Correct 4 ms 5208 KB Output is correct
34 Correct 3 ms 5208 KB Output is correct
35 Correct 3 ms 5208 KB Output is correct
36 Correct 4 ms 5208 KB Output is correct
37 Correct 3 ms 5208 KB Output is correct
38 Correct 3 ms 5204 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5076 KB Output is correct
2 Correct 3 ms 5096 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 2 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 2 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5076 KB Output is correct
18 Correct 3 ms 5076 KB Output is correct
19 Correct 130 ms 16804 KB Output is correct
20 Correct 135 ms 16800 KB Output is correct
21 Correct 129 ms 16812 KB Output is correct
22 Correct 127 ms 16852 KB Output is correct
23 Correct 166 ms 17224 KB Output is correct
24 Correct 122 ms 17840 KB Output is correct
25 Correct 80 ms 27140 KB Output is correct
26 Correct 50 ms 34840 KB Output is correct
27 Correct 180 ms 32352 KB Output is correct
28 Correct 220 ms 77464 KB Output is correct
29 Correct 220 ms 75084 KB Output is correct
30 Correct 171 ms 32168 KB Output is correct
31 Correct 168 ms 32096 KB Output is correct
32 Correct 222 ms 32348 KB Output is correct
33 Correct 223 ms 31148 KB Output is correct
34 Correct 352 ms 44236 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5076 KB Output is correct
2 Correct 3 ms 5096 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 2 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 2 ms 5076 KB Output is correct
16 Correct 3 ms 5076 KB Output is correct
17 Correct 3 ms 5076 KB Output is correct
18 Correct 3 ms 5076 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 2 ms 5076 KB Output is correct
21 Correct 3 ms 5204 KB Output is correct
22 Correct 3 ms 5204 KB Output is correct
23 Correct 4 ms 5204 KB Output is correct
24 Correct 3 ms 5204 KB Output is correct
25 Correct 4 ms 5204 KB Output is correct
26 Correct 4 ms 5204 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 4 ms 5204 KB Output is correct
29 Correct 4 ms 5204 KB Output is correct
30 Correct 3 ms 5188 KB Output is correct
31 Correct 3 ms 5204 KB Output is correct
32 Correct 3 ms 5204 KB Output is correct
33 Correct 4 ms 5208 KB Output is correct
34 Correct 3 ms 5208 KB Output is correct
35 Correct 3 ms 5208 KB Output is correct
36 Correct 4 ms 5208 KB Output is correct
37 Correct 3 ms 5208 KB Output is correct
38 Correct 3 ms 5204 KB Output is correct
39 Correct 130 ms 16804 KB Output is correct
40 Correct 135 ms 16800 KB Output is correct
41 Correct 129 ms 16812 KB Output is correct
42 Correct 127 ms 16852 KB Output is correct
43 Correct 166 ms 17224 KB Output is correct
44 Correct 122 ms 17840 KB Output is correct
45 Correct 80 ms 27140 KB Output is correct
46 Correct 50 ms 34840 KB Output is correct
47 Correct 180 ms 32352 KB Output is correct
48 Correct 220 ms 77464 KB Output is correct
49 Correct 220 ms 75084 KB Output is correct
50 Correct 171 ms 32168 KB Output is correct
51 Correct 168 ms 32096 KB Output is correct
52 Correct 222 ms 32348 KB Output is correct
53 Correct 223 ms 31148 KB Output is correct
54 Correct 352 ms 44236 KB Output is correct
55 Correct 13 ms 6732 KB Output is correct
56 Correct 10 ms 6356 KB Output is correct
57 Correct 77 ms 18504 KB Output is correct
58 Correct 47 ms 17464 KB Output is correct
59 Correct 70 ms 41168 KB Output is correct
60 Correct 218 ms 75724 KB Output is correct
61 Correct 202 ms 34004 KB Output is correct
62 Correct 172 ms 32220 KB Output is correct
63 Correct 222 ms 32332 KB Output is correct
64 Correct 436 ms 38220 KB Output is correct
65 Correct 431 ms 44876 KB Output is correct
66 Correct 239 ms 69448 KB Output is correct
67 Correct 163 ms 31320 KB Output is correct
68 Correct 310 ms 42572 KB Output is correct
69 Correct 325 ms 42736 KB Output is correct
70 Correct 291 ms 40908 KB Output is correct