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Submission #1086421

# Submission time Handle Problem Language Result Execution time Memory
1086421 2024-09-10T14:50:35 Z ehab_rafat Race (IOI11_race) C++17
100 / 100
 380 ms 101200 KB 
#include <bits/stdc++.h>
using namespace std;
#define fastio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define LSB(i) ((i) & (-i))
#define ll long long
const int dx[]{-1,1,0,0,-1,-1,1,1};
const int dy[]{0,0,1,-1,-1,1,-1,1};
const int MOD = 1e9+7;


const int N = 2e5+5;
std::vector<array<int,2>> G[N];
map<ll, ll> vec[N];
ll sum[N], dist[N], n, k, ans;

void dfs0(int u, int p, int s = 0, int d = 0){
    sum[u] = s;
    dist[u] = d;
    vec[u][s] = d;
    for(auto& nei : G[u]){
        int v = nei[0], w = nei[1];
        if(v==p) continue;
        dfs0(v, u, s+w, d+1);
    }
}

void dfs(int u, int p){
    ll target = k + 2*sum[u];
    for(auto& nei : G[u]){
        int v = nei[0];
        if(v==p) continue;
        dfs(v, u);
        if(vec[v].size() > vec[u].size()) swap(vec[u], vec[v]);
        for(auto& p : vec[v]){
            if(vec[u].count(target-p.first)){
                ans = min(ans, vec[u][target-p.first]+p.second-2*dist[u]);
            }
        }
        for(auto& p : vec[v]){
            if(!vec[u].count(p.first)) vec[u].insert(p);
            else vec[u][p.first] = min(vec[u][p.first], p.second);
        }
    }
}


int best_path(int _n, int _k, int edges[][2], int weights[]) {
    // if (k == 1) { return 0; }
    n = _n;
    k = _k;
    ans = INT_MAX;
    for (int i = 0; i < n - 1; i++) {
        int u = edges[i][0];
        int v = edges[i][1];
        G[u].push_back({v, weights[i]});
        G[v].push_back({u, weights[i]});
    }
    dfs0(0, -1);
    dfs(0, -1);
    return ans == INT_MAX ? -1 : ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 14428 KB Output is correct
2 Correct 6 ms 14384 KB Output is correct
3 Correct 6 ms 14424 KB Output is correct
4 Correct 6 ms 14372 KB Output is correct
5 Correct 6 ms 14428 KB Output is correct
6 Correct 7 ms 14384 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 8 ms 14428 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 9 ms 14428 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 9 ms 14424 KB Output is correct
13 Correct 6 ms 14428 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14568 KB Output is correct
16 Correct 6 ms 14428 KB Output is correct
17 Correct 7 ms 14428 KB Output is correct
18 Correct 6 ms 14428 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 14428 KB Output is correct
2 Correct 6 ms 14384 KB Output is correct
3 Correct 6 ms 14424 KB Output is correct
4 Correct 6 ms 14372 KB Output is correct
5 Correct 6 ms 14428 KB Output is correct
6 Correct 7 ms 14384 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 8 ms 14428 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 9 ms 14428 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 9 ms 14424 KB Output is correct
13 Correct 6 ms 14428 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14568 KB Output is correct
16 Correct 6 ms 14428 KB Output is correct
17 Correct 7 ms 14428 KB Output is correct
18 Correct 6 ms 14428 KB Output is correct
19 Correct 6 ms 14424 KB Output is correct
20 Correct 6 ms 14424 KB Output is correct
21 Correct 7 ms 14684 KB Output is correct
22 Correct 7 ms 14704 KB Output is correct
23 Correct 7 ms 14684 KB Output is correct
24 Correct 7 ms 14684 KB Output is correct
25 Correct 8 ms 14684 KB Output is correct
26 Correct 7 ms 14648 KB Output is correct
27 Correct 6 ms 14684 KB Output is correct
28 Correct 7 ms 14648 KB Output is correct
29 Correct 8 ms 14684 KB Output is correct
30 Correct 7 ms 14684 KB Output is correct
31 Correct 7 ms 14684 KB Output is correct
32 Correct 7 ms 14684 KB Output is correct
33 Correct 7 ms 14828 KB Output is correct
34 Correct 9 ms 14684 KB Output is correct
35 Correct 9 ms 14684 KB Output is correct
36 Correct 6 ms 14696 KB Output is correct
37 Correct 6 ms 14684 KB Output is correct
38 Correct 7 ms 14684 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 14428 KB Output is correct
2 Correct 6 ms 14384 KB Output is correct
3 Correct 6 ms 14424 KB Output is correct
4 Correct 6 ms 14372 KB Output is correct
5 Correct 6 ms 14428 KB Output is correct
6 Correct 7 ms 14384 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 8 ms 14428 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 9 ms 14428 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 9 ms 14424 KB Output is correct
13 Correct 6 ms 14428 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14568 KB Output is correct
16 Correct 6 ms 14428 KB Output is correct
17 Correct 7 ms 14428 KB Output is correct
18 Correct 6 ms 14428 KB Output is correct
19 Correct 104 ms 36432 KB Output is correct
20 Correct 128 ms 36412 KB Output is correct
21 Correct 92 ms 36152 KB Output is correct
22 Correct 94 ms 35664 KB Output is correct
23 Correct 141 ms 48472 KB Output is correct
24 Correct 99 ms 39248 KB Output is correct
25 Correct 82 ms 34640 KB Output is correct
26 Correct 48 ms 40532 KB Output is correct
27 Correct 149 ms 46416 KB Output is correct
28 Correct 245 ms 79188 KB Output is correct
29 Correct 230 ms 78004 KB Output is correct
30 Correct 166 ms 46416 KB Output is correct
31 Correct 167 ms 46420 KB Output is correct
32 Correct 219 ms 46672 KB Output is correct
33 Correct 220 ms 51284 KB Output is correct
34 Correct 323 ms 83284 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 14428 KB Output is correct
2 Correct 6 ms 14384 KB Output is correct
3 Correct 6 ms 14424 KB Output is correct
4 Correct 6 ms 14372 KB Output is correct
5 Correct 6 ms 14428 KB Output is correct
6 Correct 7 ms 14384 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 8 ms 14428 KB Output is correct
9 Correct 6 ms 14428 KB Output is correct
10 Correct 9 ms 14428 KB Output is correct
11 Correct 6 ms 14428 KB Output is correct
12 Correct 9 ms 14424 KB Output is correct
13 Correct 6 ms 14428 KB Output is correct
14 Correct 6 ms 14428 KB Output is correct
15 Correct 6 ms 14568 KB Output is correct
16 Correct 6 ms 14428 KB Output is correct
17 Correct 7 ms 14428 KB Output is correct
18 Correct 6 ms 14428 KB Output is correct
19 Correct 6 ms 14424 KB Output is correct
20 Correct 6 ms 14424 KB Output is correct
21 Correct 7 ms 14684 KB Output is correct
22 Correct 7 ms 14704 KB Output is correct
23 Correct 7 ms 14684 KB Output is correct
24 Correct 7 ms 14684 KB Output is correct
25 Correct 8 ms 14684 KB Output is correct
26 Correct 7 ms 14648 KB Output is correct
27 Correct 6 ms 14684 KB Output is correct
28 Correct 7 ms 14648 KB Output is correct
29 Correct 8 ms 14684 KB Output is correct
30 Correct 7 ms 14684 KB Output is correct
31 Correct 7 ms 14684 KB Output is correct
32 Correct 7 ms 14684 KB Output is correct
33 Correct 7 ms 14828 KB Output is correct
34 Correct 9 ms 14684 KB Output is correct
35 Correct 9 ms 14684 KB Output is correct
36 Correct 6 ms 14696 KB Output is correct
37 Correct 6 ms 14684 KB Output is correct
38 Correct 7 ms 14684 KB Output is correct
39 Correct 104 ms 36432 KB Output is correct
40 Correct 128 ms 36412 KB Output is correct
41 Correct 92 ms 36152 KB Output is correct
42 Correct 94 ms 35664 KB Output is correct
43 Correct 141 ms 48472 KB Output is correct
44 Correct 99 ms 39248 KB Output is correct
45 Correct 82 ms 34640 KB Output is correct
46 Correct 48 ms 40532 KB Output is correct
47 Correct 149 ms 46416 KB Output is correct
48 Correct 245 ms 79188 KB Output is correct
49 Correct 230 ms 78004 KB Output is correct
50 Correct 166 ms 46416 KB Output is correct
51 Correct 167 ms 46420 KB Output is correct
52 Correct 219 ms 46672 KB Output is correct
53 Correct 220 ms 51284 KB Output is correct
54 Correct 323 ms 83284 KB Output is correct
55 Correct 16 ms 17500 KB Output is correct
56 Correct 12 ms 16212 KB Output is correct
57 Correct 49 ms 33716 KB Output is correct
58 Correct 40 ms 27332 KB Output is correct
59 Correct 108 ms 46800 KB Output is correct
60 Correct 250 ms 78532 KB Output is correct
61 Correct 181 ms 49948 KB Output is correct
62 Correct 145 ms 46420 KB Output is correct
63 Correct 208 ms 46548 KB Output is correct
64 Correct 376 ms 101200 KB Output is correct
65 Correct 380 ms 98896 KB Output is correct
66 Correct 247 ms 75600 KB Output is correct
67 Correct 170 ms 40516 KB Output is correct
68 Correct 288 ms 62804 KB Output is correct
69 Correct 372 ms 67908 KB Output is correct
70 Correct 275 ms 60964 KB Output is correct