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답안 #197495

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
197495 2020-01-21T13:11:23 Z handlename 경주 (Race) (IOI11_race) C++17
100 / 100
 713 ms 36428 KB 
#include <bits/stdc++.h>
#include "race.h"
using namespace std;
#define mp make_pair
#define pb push_back
int n,k,res;
vector<pair<int,int> > adj[200001];
int sub[200001],lvl[200001],par[200001];
int ans[1000001];
stack<int> st;
int dfs1(int u,int p,int l){
    sub[u]=1;
    for (auto i:adj[u]){
        if (lvl[i.first]!=-1) continue;
        if (i.first==p) continue;
        sub[u]+=dfs1(i.first,u,l);
    }
    return sub[u];
}
int dfs2(int u,int p,int sn){
    for (auto i:adj[u]){
        if (lvl[i.first]!=-1) continue;
        if (i.first==p) continue;
        if (sub[i.first]>sn/2){
            return dfs2(i.first,u,sn);
        }
    }
    return u;
}
vector<pair<int,int> > branch;
void dfs3(int u,int p,long long dist,int edges){
    //cout<<dist<<" "<<edges<<'\n';
    if (dist>k){
        return;
    }
    branch.pb(mp(dist,edges));
    st.push(dist);
    for (auto i:adj[u]){
        if (lvl[i.first]!=-1) continue;
        if (i.first==p) continue;
        dfs3(i.first,u,dist+i.second,edges+1);
        if (p==-1){
            branch.pb(mp(dist,edges));
            for (auto j:branch){
                res=min(res,ans[k-j.first]+j.second);
            }
            for (auto j:branch){
                ans[j.first]=min(ans[j.first],j.second);
            }
            branch.clear();
        }
    }
}
// Building from node u, with a parent p and level l
void build(int u,int p,int l){
    int cn=dfs1(u,p,l);
    int cent=dfs2(u,p,cn);
    if (p==-1) p=cent;
    par[cent]=p;
    lvl[cent]=l;
    //cout<<"centroid: "<<cent<<'\n';
    dfs3(cent,-1,0,0);
    while (!st.empty()){
        int cur=st.top();
        ans[cur]=1e9;
        st.pop();
    }
    for (auto i:adj[cent]){
        if (lvl[i.first]!=-1) continue;
        build(i.first,cent,l+1);
    }
}
int best_path(int N, int K, int H[][2], int L[]){
    n=N;
    k=K;
    for (int i=0;i<n-1;i++){
        adj[H[i][0]].pb(mp(H[i][1],L[i]));
        adj[H[i][1]].pb(mp(H[i][0],L[i]));
    }
    res=1e9;
    for (int i=0;i<=k;i++) ans[i]=1e9;
    memset(lvl,-1,sizeof(lvl));
    build(0,-1,0);
    if (res==1e9) return -1;
    return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 7 ms 5880 KB Output is correct
4 Correct 8 ms 5880 KB Output is correct
5 Correct 7 ms 5880 KB Output is correct
6 Correct 7 ms 5880 KB Output is correct
7 Correct 7 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5876 KB Output is correct
10 Correct 7 ms 5756 KB Output is correct
11 Correct 7 ms 5880 KB Output is correct
12 Correct 7 ms 5880 KB Output is correct
13 Correct 8 ms 5872 KB Output is correct
14 Correct 7 ms 5880 KB Output is correct
15 Correct 7 ms 5880 KB Output is correct
16 Correct 7 ms 5880 KB Output is correct
17 Correct 7 ms 5880 KB Output is correct
18 Correct 7 ms 5880 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 7 ms 5880 KB Output is correct
4 Correct 8 ms 5880 KB Output is correct
5 Correct 7 ms 5880 KB Output is correct
6 Correct 7 ms 5880 KB Output is correct
7 Correct 7 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5876 KB Output is correct
10 Correct 7 ms 5756 KB Output is correct
11 Correct 7 ms 5880 KB Output is correct
12 Correct 7 ms 5880 KB Output is correct
13 Correct 8 ms 5872 KB Output is correct
14 Correct 7 ms 5880 KB Output is correct
15 Correct 7 ms 5880 KB Output is correct
16 Correct 7 ms 5880 KB Output is correct
17 Correct 7 ms 5880 KB Output is correct
18 Correct 7 ms 5880 KB Output is correct
19 Correct 7 ms 5752 KB Output is correct
20 Correct 7 ms 5880 KB Output is correct
21 Correct 8 ms 5880 KB Output is correct
22 Correct 11 ms 9464 KB Output is correct
23 Correct 11 ms 8876 KB Output is correct
24 Correct 11 ms 9336 KB Output is correct
25 Correct 11 ms 9208 KB Output is correct
26 Correct 9 ms 7160 KB Output is correct
27 Correct 11 ms 9076 KB Output is correct
28 Correct 9 ms 6648 KB Output is correct
29 Correct 9 ms 7160 KB Output is correct
30 Correct 9 ms 7420 KB Output is correct
31 Correct 11 ms 8440 KB Output is correct
32 Correct 11 ms 8700 KB Output is correct
33 Correct 11 ms 8952 KB Output is correct
34 Correct 11 ms 8184 KB Output is correct
35 Correct 12 ms 9080 KB Output is correct
36 Correct 12 ms 9592 KB Output is correct
37 Correct 11 ms 8952 KB Output is correct
38 Correct 10 ms 7928 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 7 ms 5880 KB Output is correct
4 Correct 8 ms 5880 KB Output is correct
5 Correct 7 ms 5880 KB Output is correct
6 Correct 7 ms 5880 KB Output is correct
7 Correct 7 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5876 KB Output is correct
10 Correct 7 ms 5756 KB Output is correct
11 Correct 7 ms 5880 KB Output is correct
12 Correct 7 ms 5880 KB Output is correct
13 Correct 8 ms 5872 KB Output is correct
14 Correct 7 ms 5880 KB Output is correct
15 Correct 7 ms 5880 KB Output is correct
16 Correct 7 ms 5880 KB Output is correct
17 Correct 7 ms 5880 KB Output is correct
18 Correct 7 ms 5880 KB Output is correct
19 Correct 166 ms 12972 KB Output is correct
20 Correct 166 ms 12880 KB Output is correct
21 Correct 175 ms 13208 KB Output is correct
22 Correct 163 ms 13608 KB Output is correct
23 Correct 134 ms 13172 KB Output is correct
24 Correct 92 ms 13048 KB Output is correct
25 Correct 202 ms 15712 KB Output is correct
26 Correct 131 ms 19516 KB Output is correct
27 Correct 233 ms 20316 KB Output is correct
28 Correct 446 ms 31760 KB Output is correct
29 Correct 465 ms 30712 KB Output is correct
30 Correct 238 ms 20328 KB Output is correct
31 Correct 238 ms 20216 KB Output is correct
32 Correct 287 ms 20344 KB Output is correct
33 Correct 362 ms 19064 KB Output is correct
34 Correct 349 ms 19964 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 7 ms 5880 KB Output is correct
4 Correct 8 ms 5880 KB Output is correct
5 Correct 7 ms 5880 KB Output is correct
6 Correct 7 ms 5880 KB Output is correct
7 Correct 7 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5876 KB Output is correct
10 Correct 7 ms 5756 KB Output is correct
11 Correct 7 ms 5880 KB Output is correct
12 Correct 7 ms 5880 KB Output is correct
13 Correct 8 ms 5872 KB Output is correct
14 Correct 7 ms 5880 KB Output is correct
15 Correct 7 ms 5880 KB Output is correct
16 Correct 7 ms 5880 KB Output is correct
17 Correct 7 ms 5880 KB Output is correct
18 Correct 7 ms 5880 KB Output is correct
19 Correct 7 ms 5752 KB Output is correct
20 Correct 7 ms 5880 KB Output is correct
21 Correct 8 ms 5880 KB Output is correct
22 Correct 11 ms 9464 KB Output is correct
23 Correct 11 ms 8876 KB Output is correct
24 Correct 11 ms 9336 KB Output is correct
25 Correct 11 ms 9208 KB Output is correct
26 Correct 9 ms 7160 KB Output is correct
27 Correct 11 ms 9076 KB Output is correct
28 Correct 9 ms 6648 KB Output is correct
29 Correct 9 ms 7160 KB Output is correct
30 Correct 9 ms 7420 KB Output is correct
31 Correct 11 ms 8440 KB Output is correct
32 Correct 11 ms 8700 KB Output is correct
33 Correct 11 ms 8952 KB Output is correct
34 Correct 11 ms 8184 KB Output is correct
35 Correct 12 ms 9080 KB Output is correct
36 Correct 12 ms 9592 KB Output is correct
37 Correct 11 ms 8952 KB Output is correct
38 Correct 10 ms 7928 KB Output is correct
39 Correct 166 ms 12972 KB Output is correct
40 Correct 166 ms 12880 KB Output is correct
41 Correct 175 ms 13208 KB Output is correct
42 Correct 163 ms 13608 KB Output is correct
43 Correct 134 ms 13172 KB Output is correct
44 Correct 92 ms 13048 KB Output is correct
45 Correct 202 ms 15712 KB Output is correct
46 Correct 131 ms 19516 KB Output is correct
47 Correct 233 ms 20316 KB Output is correct
48 Correct 446 ms 31760 KB Output is correct
49 Correct 465 ms 30712 KB Output is correct
50 Correct 238 ms 20328 KB Output is correct
51 Correct 238 ms 20216 KB Output is correct
52 Correct 287 ms 20344 KB Output is correct
53 Correct 362 ms 19064 KB Output is correct
54 Correct 349 ms 19964 KB Output is correct
55 Correct 19 ms 6548 KB Output is correct
56 Correct 19 ms 6540 KB Output is correct
57 Correct 109 ms 13836 KB Output is correct
58 Correct 54 ms 14700 KB Output is correct
59 Correct 132 ms 20028 KB Output is correct
60 Correct 713 ms 36428 KB Output is correct
61 Correct 246 ms 20600 KB Output is correct
62 Correct 269 ms 24860 KB Output is correct
63 Correct 362 ms 24980 KB Output is correct
64 Correct 581 ms 24196 KB Output is correct
65 Correct 321 ms 21344 KB Output is correct
66 Correct 584 ms 32716 KB Output is correct
67 Correct 199 ms 25684 KB Output is correct
68 Correct 354 ms 25300 KB Output is correct
69 Correct 361 ms 25472 KB Output is correct
70 Correct 341 ms 24688 KB Output is correct