oj.uz

답안 #488280

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
488280 2021-11-18T11:56:42 Z SlavicG 경주 (Race) (IOI11_race) C++17
100 / 100
 1026 ms 44788 KB 
#include "race.h"
#include "bits/stdc++.h"
using namespace std;
 
#define ll long long
 
#define       forn(i,n)              for(int i=0;i<n;i++)
#define          all(v)              v.begin(), v.end()
#define         rall(v)              v.rbegin(),v.rend()
 
#define            pb                push_back
#define          sz(a)               (int)a.size()

const int N = 2e5 + 10;
vector<pair<int, ll>> adj[N];
bool vis[N];
int s[N];
int K;
map<ll, int> dp;

void recalc(int u, int par){
    s[u] = 1;
    for(auto x: adj[u]){
        int v = x.first;
        if(v == par || vis[v])continue;
        recalc(v, u);
        s[u] += s[v];
    }
}

int find_centroid(int u, int need, int par){
    for(auto x: adj[u]){
        int v = x.first;
        if(v == par || vis[v])continue;
        if(s[v] > need)return find_centroid(v, need, u);
    }
    return u;
}

int ans = INT_MAX;

void dfs(int u, int par, ll weight, int type, int depth){
    if(weight > K)return; 
    if(type == 0){
        if(dp.count(K - weight)){
            ans = min(ans, dp[K - weight] + depth);
        }
    }
    else{
        if(!dp.count(weight))dp[weight] = depth;
        else dp[weight] = min(dp[weight], depth);
    }

    for(auto x: adj[u]){
        ll v = x.first, w = x.second;

        if(v == par || vis[v])continue;
        dfs(v, u, weight + w, type, depth + 1);
    }
}

void centroid_decomp(int u){
    recalc(u, -1);
    int c = find_centroid(u, s[u] / 2, -1);
    vis[c] = true;
    dp.clear();
    dp[0] = 0;
    for(auto x: adj[c]){
        ll v = x.first, w = x.second;
        if(vis[v])continue;
        dfs(v, -1, w, 0, 1);
        dfs(v, -1, w, 1, 1);
    }


    for(auto x: adj[c]){
        int v = x.first;
        if(vis[v])continue;
        centroid_decomp(v);
    }
}

int best_path(int n, int k, int h[][2],int l[]){
    ans = INT_MAX;
    K = k;
    for(int i = 0;i < n; ++i){
        adj[i].clear();
        vis[i] = 0;
        s[i] = 0;
    }
    dp.clear();
    for(int i = 0;i < n - 1; ++i){
        adj[h[i][0]].pb({h[i][1], l[i]});
        adj[h[i][1]].pb({h[i][0], l[i]});
    }

    centroid_decomp(0);
    if(ans == INT_MAX)return -1;
    return ans;
}
/*
void solve()
{ 
    int n, k;
    cin >> n >> k;
    K = k;
    vector<vector<int>> h(n - 1, vector<int>(2, 0));
    vector<int> l(n - 1);
    for(int i = 0;i < n - 1; ++i){
        cin >> h[i][0] >> h[i][1];
    }
    for(int i = 0;i < n - 1; ++i){
        cin >> l[i];
    }

    cout << best_path(n, k, h, l) << "\n";

}   
 
int32_t main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
}
*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 3 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 3 ms 5068 KB Output is correct
28 Correct 3 ms 5068 KB Output is correct
29 Correct 3 ms 5068 KB Output is correct
30 Correct 4 ms 5020 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 3 ms 5096 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 187 ms 11756 KB Output is correct
20 Correct 189 ms 11756 KB Output is correct
21 Correct 200 ms 11776 KB Output is correct
22 Correct 199 ms 11764 KB Output is correct
23 Correct 80 ms 12140 KB Output is correct
24 Correct 72 ms 11228 KB Output is correct
25 Correct 129 ms 15476 KB Output is correct
26 Correct 96 ms 19172 KB Output is correct
27 Correct 210 ms 19044 KB Output is correct
28 Correct 270 ms 33160 KB Output is correct
29 Correct 262 ms 32068 KB Output is correct
30 Correct 200 ms 19704 KB Output is correct
31 Correct 197 ms 19896 KB Output is correct
32 Correct 232 ms 19720 KB Output is correct
33 Correct 273 ms 18596 KB Output is correct
34 Correct 176 ms 18452 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 3 ms 5068 KB Output is correct
24 Correct 3 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 3 ms 5068 KB Output is correct
28 Correct 3 ms 5068 KB Output is correct
29 Correct 3 ms 5068 KB Output is correct
30 Correct 4 ms 5020 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 3 ms 5068 KB Output is correct
35 Correct 3 ms 5096 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 187 ms 11756 KB Output is correct
40 Correct 189 ms 11756 KB Output is correct
41 Correct 200 ms 11776 KB Output is correct
42 Correct 199 ms 11764 KB Output is correct
43 Correct 80 ms 12140 KB Output is correct
44 Correct 72 ms 11228 KB Output is correct
45 Correct 129 ms 15476 KB Output is correct
46 Correct 96 ms 19172 KB Output is correct
47 Correct 210 ms 19044 KB Output is correct
48 Correct 270 ms 33160 KB Output is correct
49 Correct 262 ms 32068 KB Output is correct
50 Correct 200 ms 19704 KB Output is correct
51 Correct 197 ms 19896 KB Output is correct
52 Correct 232 ms 19720 KB Output is correct
53 Correct 273 ms 18596 KB Output is correct
54 Correct 176 ms 18452 KB Output is correct
55 Correct 19 ms 5996 KB Output is correct
56 Correct 15 ms 5728 KB Output is correct
57 Correct 131 ms 12796 KB Output is correct
58 Correct 43 ms 11972 KB Output is correct
59 Correct 273 ms 24524 KB Output is correct
60 Correct 866 ms 44788 KB Output is correct
61 Correct 278 ms 20000 KB Output is correct
62 Correct 281 ms 19880 KB Output is correct
63 Correct 359 ms 20000 KB Output is correct
64 Correct 1026 ms 25288 KB Output is correct
65 Correct 219 ms 19168 KB Output is correct
66 Correct 552 ms 30392 KB Output is correct
67 Correct 124 ms 18464 KB Output is correct
68 Correct 392 ms 24004 KB Output is correct
69 Correct 386 ms 23660 KB Output is correct
70 Correct 368 ms 23332 KB Output is correct