oj.uz

답안 #260288

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
260288 2020-08-10T04:13:05 Z aggu_01000101 경주 (Race) (IOI11_race) C++14
100 / 100
 1486 ms 132292 KB 
#include <iostream>
#include <assert.h>
#include <algorithm>
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <map>
#include <bits/stdc++.h>
#define initrand mt19937 mt_rand(time(0));
#define rand mt_rand()
#define int long long
#define INF 10000000000000000
#define MOD 1000000007
using namespace std;
const int N = 200005;
const int K = 1000005;
vector<pair<int, int>> adj[N];
int tb = 0;
int t = 0;
int tin[N], tout[N];
int depth[N], edges[N];
int h[N][20];
int s[N], size = 0;
int ans = INF;
vector<int> ett;
map<int, int> d;
map<int, bool> vis;
int LCA_DFS(int i, int par, int dep, int edep){
    tin[i] = ett.size();
    ett.push_back(i);
    depth[i] = dep;
    edges[i] = edep;
    s[i] = 1;
    if(i!=par){
        h[i][0] = par;
        for(int j = 1;j<=19;j++){
            if(h[i][j-1] != -1) h[i][j] = h[h[i][j-1]][j-1];
        }
    }
    for(pair<int, int> j: adj[i]){
        if(j.first == par) continue;
        s[i] += LCA_DFS(j.first, i, dep + j.second, edep+1);
    }
    tout[i] = ett.size();
    return s[i];
}
bool anc(int u, int v){
    if((tin[u] <= tin[v]) && (tout[u] >= tout[v])) return true;
    return false;
}
int LCA(int u, int v){
    if(anc(u, v)){
        return u;
    }
    if(anc(v, u)) return v;
    for(int i = 19;i>=0;i--){
        if(h[u][i]!=-1 && !anc(h[u][i], v)) u = h[u][i];
    }
    return h[u][0];
}
pair<int, int> dist(int u, int v){
    return {(depth[u] + depth[v] - 2*depth[LCA(u, v)]), (edges[u] + edges[v] - 2*edges[LCA(u, v)])};
}
pair<int, int> dfs(int i, int par, int keep){
    pair<int, int> comp = {0, 0};
    int bigChild = -1, mx = 0;
    for(pair<int, int> j: adj[i]){
        if(j.first == par) continue;
        if(s[j.first] > mx){
            bigChild = j.first;
            mx = s[j.first];
        }
    }
    for(pair<int, int> j: adj[i]){
        if(j.first == par || j.first == bigChild) continue;
        dfs(j.first, i, 0);
    }
    if(bigChild != -1){
        comp = dfs(bigChild, i, 1);
        comp.first += dist(bigChild, i).first; //d[x] is actually at d[x - comp.first]
        //when we want d[x], we have to try d[x + ]
        comp.second++;//d[x] = y actually means d[x] = y + comp.second
    }
    vis[0 - comp.first] = true;
    d[0 - comp.first] = -comp.second;
    if(vis[tb - comp.first]) ans = min(ans, d[tb-comp.first] + comp.second);
    for(pair<int, int> j: adj[i]){
        if(j.first == par || j.first == bigChild) continue;
        for(int x = tin[j.first];x<tout[j.first];x++){
            pair<int, int> lol = dist(i, ett[x]);
            if(lol.first > tb) continue;
            if(vis[tb - lol.first - comp.first]) ans = min(ans, d[tb-lol.first-comp.first] + comp.second + lol.second);
        }
        for(int x = tin[j.first];x<tout[j.first];x++){
            pair<int, int> lol = dist(i, ett[x]);
            if(lol.first > tb) continue;
            if(!vis[lol.first - comp.first]){
                vis[lol.first - comp.first] = true;
                d[lol.first - comp.first] = lol.second - comp.second;
            }
            else{
                d[lol.first - comp.first] = min(d[lol.first - comp.first], lol.second - comp.second);
            }
        }
    }
    if(keep == 0){
        d.clear();
        vis.clear();
    }
    return comp;
}
signed best_path(signed n, signed k, signed hh[][2], signed l[]){
    tb = k;
    ans = INF;
    for(int i = 0;i<(n-1);i++){
        adj[hh[i][0]+1].push_back({hh[i][1]+1, l[i]});
        adj[hh[i][1]+1].push_back({hh[i][0]+1, l[i]});
    }
    for(int i = 1;i<=n;i++){
        for(int j = 0;j<20;j++) h[i][j] = -1;
    }
    LCA_DFS(1, 1, 0, 0);
    dfs(1 ,1 ,0);
    if(ans>=INF) ans = -1;
    return ans;
}
/*signed main(){
    signed n, k;
    cin>>n>>k;
    signed bitch[n-1][2];
    signed l[n-1];
    for(int i =0 ;i<(n-1);i++) cin>>bitch[i][0]>>bitch[i][1]>>l[i];
    cout<<best_path(n, k, bitch, l)<<endl;
}*/
/*
11 12
0 1 3
0 2 4
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7
 */
/*
3 3
0 1 1
1 2 1
 */

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 3 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 3 ms 5120 KB Output is correct
7 Correct 3 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5248 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 4 ms 5120 KB Output is correct
13 Correct 4 ms 5084 KB Output is correct
14 Correct 3 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 3 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 3 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 3 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 3 ms 5120 KB Output is correct
7 Correct 3 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5248 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 4 ms 5120 KB Output is correct
13 Correct 4 ms 5084 KB Output is correct
14 Correct 3 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 3 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 3 ms 5120 KB Output is correct
19 Correct 3 ms 5120 KB Output is correct
20 Correct 3 ms 5120 KB Output is correct
21 Correct 5 ms 5376 KB Output is correct
22 Correct 5 ms 5376 KB Output is correct
23 Correct 4 ms 5376 KB Output is correct
24 Correct 5 ms 5376 KB Output is correct
25 Correct 6 ms 5504 KB Output is correct
26 Correct 6 ms 5376 KB Output is correct
27 Correct 4 ms 5376 KB Output is correct
28 Correct 5 ms 5504 KB Output is correct
29 Correct 6 ms 5504 KB Output is correct
30 Correct 6 ms 5504 KB Output is correct
31 Correct 6 ms 5504 KB Output is correct
32 Correct 6 ms 5632 KB Output is correct
33 Correct 6 ms 5504 KB Output is correct
34 Correct 5 ms 5504 KB Output is correct
35 Correct 6 ms 5504 KB Output is correct
36 Correct 5 ms 5504 KB Output is correct
37 Correct 5 ms 5504 KB Output is correct
38 Correct 5 ms 5504 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 3 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 3 ms 5120 KB Output is correct
7 Correct 3 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5248 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 4 ms 5120 KB Output is correct
13 Correct 4 ms 5084 KB Output is correct
14 Correct 3 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 3 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 3 ms 5120 KB Output is correct
19 Correct 268 ms 33396 KB Output is correct
20 Correct 256 ms 33432 KB Output is correct
21 Correct 258 ms 33396 KB Output is correct
22 Correct 278 ms 33524 KB Output is correct
23 Correct 190 ms 34036 KB Output is correct
24 Correct 181 ms 33140 KB Output is correct
25 Correct 166 ms 42480 KB Output is correct
26 Correct 92 ms 50056 KB Output is correct
27 Correct 292 ms 61676 KB Output is correct
28 Correct 514 ms 132292 KB Output is correct
29 Correct 512 ms 127068 KB Output is correct
30 Correct 284 ms 61680 KB Output is correct
31 Correct 284 ms 61732 KB Output is correct
32 Correct 408 ms 62128 KB Output is correct
33 Correct 395 ms 61036 KB Output is correct
34 Correct 405 ms 61804 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 3 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 3 ms 5120 KB Output is correct
7 Correct 3 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5248 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 4 ms 5120 KB Output is correct
13 Correct 4 ms 5084 KB Output is correct
14 Correct 3 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 3 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 3 ms 5120 KB Output is correct
19 Correct 3 ms 5120 KB Output is correct
20 Correct 3 ms 5120 KB Output is correct
21 Correct 5 ms 5376 KB Output is correct
22 Correct 5 ms 5376 KB Output is correct
23 Correct 4 ms 5376 KB Output is correct
24 Correct 5 ms 5376 KB Output is correct
25 Correct 6 ms 5504 KB Output is correct
26 Correct 6 ms 5376 KB Output is correct
27 Correct 4 ms 5376 KB Output is correct
28 Correct 5 ms 5504 KB Output is correct
29 Correct 6 ms 5504 KB Output is correct
30 Correct 6 ms 5504 KB Output is correct
31 Correct 6 ms 5504 KB Output is correct
32 Correct 6 ms 5632 KB Output is correct
33 Correct 6 ms 5504 KB Output is correct
34 Correct 5 ms 5504 KB Output is correct
35 Correct 6 ms 5504 KB Output is correct
36 Correct 5 ms 5504 KB Output is correct
37 Correct 5 ms 5504 KB Output is correct
38 Correct 5 ms 5504 KB Output is correct
39 Correct 268 ms 33396 KB Output is correct
40 Correct 256 ms 33432 KB Output is correct
41 Correct 258 ms 33396 KB Output is correct
42 Correct 278 ms 33524 KB Output is correct
43 Correct 190 ms 34036 KB Output is correct
44 Correct 181 ms 33140 KB Output is correct
45 Correct 166 ms 42480 KB Output is correct
46 Correct 92 ms 50056 KB Output is correct
47 Correct 292 ms 61676 KB Output is correct
48 Correct 514 ms 132292 KB Output is correct
49 Correct 512 ms 127068 KB Output is correct
50 Correct 284 ms 61680 KB Output is correct
51 Correct 284 ms 61732 KB Output is correct
52 Correct 408 ms 62128 KB Output is correct
53 Correct 395 ms 61036 KB Output is correct
54 Correct 405 ms 61804 KB Output is correct
55 Correct 28 ms 8696 KB Output is correct
56 Correct 18 ms 7936 KB Output is correct
57 Correct 171 ms 33516 KB Output is correct
58 Correct 87 ms 33384 KB Output is correct
59 Correct 183 ms 68460 KB Output is correct
60 Correct 588 ms 130280 KB Output is correct
61 Correct 362 ms 62440 KB Output is correct
62 Correct 320 ms 62312 KB Output is correct
63 Correct 459 ms 62308 KB Output is correct
64 Correct 1486 ms 81668 KB Output is correct
65 Correct 432 ms 62828 KB Output is correct
66 Correct 552 ms 115556 KB Output is correct
67 Correct 313 ms 63068 KB Output is correct
68 Correct 722 ms 88036 KB Output is correct
69 Correct 743 ms 88904 KB Output is correct
70 Correct 787 ms 85480 KB Output is correct