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Submission #574161

# Submission time Handle Problem Language Result Execution time Memory
574161 2022-06-08T05:14:13 Z AJ00 Race (IOI11_race) C++14
21 / 100
 3000 ms 27128 KB 
#include <bits/stdc++.h>
//#include "race.h"
using namespace std;
//#define int long long 
//#define int long long 
const int MAXN = 200001;
const int LOGN = 20;
vector<vector<pair<int,int>>> adj(MAXN);
int depth[MAXN];
int par[MAXN][LOGN],weight[MAXN][LOGN];
pair<int,int> lca(int x, int y){
    int X = x, Y = y;
    if (depth[X] < depth[Y]){
        swap(x,y);
        swap(X,Y);
    }
    int dh = depth[x]-depth[y];
    int totw = 0;
    for (int i = LOGN-1; i >= 0; i--){
        if (dh&(1<<i)){
            totw += weight[x][i];
            x = par[x][i];
        }
    }
    if (x == y){
        return {totw, depth[X]-depth[Y]};
    }
    int lvl = 0;
    for (int i = LOGN-1; i >= 0; i--){
        if (par[x][i] != par[y][i]){
            totw += weight[x][i];
            totw += weight[y][i];
            lvl += (1<<i);
            x = par[x][i];
            y = par[y][i];
        }
    }
    totw += weight[x][0];
    totw += weight[y][0];
    lvl += 1;
    lvl *= 2;
    return {totw,lvl+depth[X]-depth[Y]};
}
void dfs(int x, int h = 0, int p= 0, int w = 0){
    depth[x] = h;
    par[x][0] = p;
    weight[x][0] = w;
    for (int i = 1; i < LOGN; i++){
        par[x][i] = par[par[x][i-1]][i-1];
        weight[x][i] = weight[x][i-1] + weight[par[x][i-1]][i-1];
    }
    for (auto ch: adj[x]){
        int t = ch.first;
        int wt = ch.second;
        if (t != p){
            dfs(t,h+1,x,wt);
        }
    }
}
int best_path(int N,int K,int H[][2],int L[]){
    for (int i = 0; i < N-1; i++){
        adj[H[i][0]].push_back({H[i][1],L[i]});
        adj[H[i][1]].push_back({H[i][0],L[i]});
    }
    dfs(0);
    int ans = N;
    for (int i = 0; i < N; i++){
        for (int j = i+1; j < N; j++){
            pair<int,int> l = lca(i,j);
            if (l.first == K){
               // cout << i << " " << j << " " << depth[i] << " " << depth[j] << "\n";
                ans = min(ans,l.second);
            }
        }
    }
    ans -= (ans == N ? N+1 : 0);
    return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5012 KB Output is correct
2 Correct 4 ms 5020 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 4980 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 4 ms 5016 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5020 KB Output is correct
14 Correct 4 ms 5016 KB Output is correct
15 Correct 3 ms 5004 KB Output is correct
16 Correct 5 ms 5068 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5012 KB Output is correct
2 Correct 4 ms 5020 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 4980 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 4 ms 5016 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5020 KB Output is correct
14 Correct 4 ms 5016 KB Output is correct
15 Correct 3 ms 5004 KB Output is correct
16 Correct 5 ms 5068 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 43 ms 5204 KB Output is correct
22 Correct 46 ms 5204 KB Output is correct
23 Correct 45 ms 5264 KB Output is correct
24 Correct 43 ms 5244 KB Output is correct
25 Correct 46 ms 5156 KB Output is correct
26 Correct 48 ms 5244 KB Output is correct
27 Correct 42 ms 5240 KB Output is correct
28 Correct 49 ms 5204 KB Output is correct
29 Correct 39 ms 5244 KB Output is correct
30 Correct 38 ms 5204 KB Output is correct
31 Correct 41 ms 5204 KB Output is correct
32 Correct 42 ms 5244 KB Output is correct
33 Correct 44 ms 5204 KB Output is correct
34 Correct 52 ms 5232 KB Output is correct
35 Correct 45 ms 5224 KB Output is correct
36 Correct 40 ms 5212 KB Output is correct
37 Correct 37 ms 5208 KB Output is correct
38 Correct 45 ms 5216 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5012 KB Output is correct
2 Correct 4 ms 5020 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 4980 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 4 ms 5016 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5020 KB Output is correct
14 Correct 4 ms 5016 KB Output is correct
15 Correct 3 ms 5004 KB Output is correct
16 Correct 5 ms 5068 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Execution timed out 3049 ms 27128 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5012 KB Output is correct
2 Correct 4 ms 5020 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 4980 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 4 ms 5016 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5020 KB Output is correct
14 Correct 4 ms 5016 KB Output is correct
15 Correct 3 ms 5004 KB Output is correct
16 Correct 5 ms 5068 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 43 ms 5204 KB Output is correct
22 Correct 46 ms 5204 KB Output is correct
23 Correct 45 ms 5264 KB Output is correct
24 Correct 43 ms 5244 KB Output is correct
25 Correct 46 ms 5156 KB Output is correct
26 Correct 48 ms 5244 KB Output is correct
27 Correct 42 ms 5240 KB Output is correct
28 Correct 49 ms 5204 KB Output is correct
29 Correct 39 ms 5244 KB Output is correct
30 Correct 38 ms 5204 KB Output is correct
31 Correct 41 ms 5204 KB Output is correct
32 Correct 42 ms 5244 KB Output is correct
33 Correct 44 ms 5204 KB Output is correct
34 Correct 52 ms 5232 KB Output is correct
35 Correct 45 ms 5224 KB Output is correct
36 Correct 40 ms 5212 KB Output is correct
37 Correct 37 ms 5208 KB Output is correct
38 Correct 45 ms 5216 KB Output is correct
39 Execution timed out 3049 ms 27128 KB Time limit exceeded
40 Halted 0 ms 0 KB -