oj.uz

답안 #403774

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
403774 2021-05-13T12:38:39 Z Newtech66 경주 (Race) (IOI11_race) C++17
100 / 100
 1431 ms 43460 KB 
#include "race.h"
#include<bits/stdc++.h>
#define MAXN 200000
using namespace std;
vector<vector<pair<int,int> > > g(MAXN);
vector<int> subsz(MAXN);
bitset<MAXN> del;
int ans=INT_MAX;

void dfssz(int u,int p=-1)
{
    subsz[u]=1;
    for(auto ch:g[u])
    {
        if(ch.first==p) continue;
        if(!del.test(ch.first))
        {
            dfssz(ch.first,u);
            subsz[u]+=subsz[ch.first];
        }
    }
}

int getcen(int u,int sz,int p=-1)
{
    for(auto ch:g[u])
    {
        if(ch.first==p) continue;
        if(!del.test(ch.first))
            if(subsz[ch.first]>sz/2)    return getcen(ch.first,sz,u);
    }
    return u;
}

void place(map<int,int> &m,map<int,int> &m2,int len,int nm,int K)
{
    if(m2.find(len)==m2.end())    m2[len]=nm;
    else    m2[len]=min(m2[len],nm);
    if(m.find(K-len)!=m.end())    ans=min(ans,m2[len]+m[K-len]);
}

void solve(int u,map<int,int> &m,map<int,int> &m2,int len,int K,int dep,int p)
{
    for(auto ch:g[u])
    {
        if(ch.first==p) continue;
        if(!del.test(ch.first))
            if(len+ch.second<=K)
            {
                place(m,m2,len+ch.second,1+dep,K);
                solve(ch.first,m,m2,len+ch.second,K,1+dep,u);
            }
    }
}

void centroid(int u,const int& K)
{
    dfssz(u);
    int C=getcen(u,subsz[u]);
    map<int,int> m;
    for(auto ch:g[C])
    {
        if(!del.test(ch.first))
            if(ch.second<=K)
            {
                map<int,int> m2;
                place(m,m2,ch.second,1,K);
                solve(ch.first,m,m2,ch.second,K,1,C);
                for(auto p:m2)
                {
                    if(m.find(p.first)==m.end())    m[p.first]=p.second;
                    else    m[p.first]=min(m[p.first],p.second);
                }
            }
    }
    if(m.find(K)!=m.end())  ans=min(ans,m[K]);
    del.flip(C);
    for(auto ch:g[C])
        if(!del.test(ch.first)) centroid(ch.first,K);
}
 
int best_path(int N, int K, int H[][2], int L[])
{
    for(int i=0;i<N-1;i++)
    {
        int u=H[i][0],v=H[i][1];
        g[u].emplace_back(v,L[i]);
        g[v].emplace_back(u,L[i]);
    }
    centroid(0,K);
    if(ans==INT_MAX)  return -1;
    else  return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 5 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 5 ms 5716 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 4 ms 5800 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5708 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5792 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 5 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 5 ms 5716 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 4 ms 5800 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5708 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5792 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 5 ms 5708 KB Output is correct
21 Correct 6 ms 5872 KB Output is correct
22 Correct 6 ms 5836 KB Output is correct
23 Correct 6 ms 5836 KB Output is correct
24 Correct 6 ms 5832 KB Output is correct
25 Correct 6 ms 5836 KB Output is correct
26 Correct 5 ms 5836 KB Output is correct
27 Correct 5 ms 5780 KB Output is correct
28 Correct 6 ms 5836 KB Output is correct
29 Correct 6 ms 5836 KB Output is correct
30 Correct 6 ms 5836 KB Output is correct
31 Correct 6 ms 5836 KB Output is correct
32 Correct 6 ms 5836 KB Output is correct
33 Correct 6 ms 5816 KB Output is correct
34 Correct 5 ms 5836 KB Output is correct
35 Correct 5 ms 5836 KB Output is correct
36 Correct 5 ms 5836 KB Output is correct
37 Correct 6 ms 5836 KB Output is correct
38 Correct 6 ms 5836 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 5 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 5 ms 5716 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 4 ms 5800 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5708 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5792 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 264 ms 10584 KB Output is correct
20 Correct 258 ms 10776 KB Output is correct
21 Correct 273 ms 10692 KB Output is correct
22 Correct 257 ms 10796 KB Output is correct
23 Correct 117 ms 10888 KB Output is correct
24 Correct 107 ms 10740 KB Output is correct
25 Correct 175 ms 13400 KB Output is correct
26 Correct 123 ms 16364 KB Output is correct
27 Correct 270 ms 15828 KB Output is correct
28 Correct 345 ms 26864 KB Output is correct
29 Correct 309 ms 25976 KB Output is correct
30 Correct 286 ms 15600 KB Output is correct
31 Correct 271 ms 15708 KB Output is correct
32 Correct 287 ms 15820 KB Output is correct
33 Correct 476 ms 14600 KB Output is correct
34 Correct 214 ms 14512 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5708 KB Output is correct
2 Correct 5 ms 5708 KB Output is correct
3 Correct 4 ms 5708 KB Output is correct
4 Correct 5 ms 5716 KB Output is correct
5 Correct 4 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 4 ms 5800 KB Output is correct
8 Correct 4 ms 5708 KB Output is correct
9 Correct 4 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 4 ms 5708 KB Output is correct
12 Correct 4 ms 5708 KB Output is correct
13 Correct 4 ms 5708 KB Output is correct
14 Correct 4 ms 5708 KB Output is correct
15 Correct 4 ms 5708 KB Output is correct
16 Correct 4 ms 5792 KB Output is correct
17 Correct 4 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 5 ms 5708 KB Output is correct
21 Correct 6 ms 5872 KB Output is correct
22 Correct 6 ms 5836 KB Output is correct
23 Correct 6 ms 5836 KB Output is correct
24 Correct 6 ms 5832 KB Output is correct
25 Correct 6 ms 5836 KB Output is correct
26 Correct 5 ms 5836 KB Output is correct
27 Correct 5 ms 5780 KB Output is correct
28 Correct 6 ms 5836 KB Output is correct
29 Correct 6 ms 5836 KB Output is correct
30 Correct 6 ms 5836 KB Output is correct
31 Correct 6 ms 5836 KB Output is correct
32 Correct 6 ms 5836 KB Output is correct
33 Correct 6 ms 5816 KB Output is correct
34 Correct 5 ms 5836 KB Output is correct
35 Correct 5 ms 5836 KB Output is correct
36 Correct 5 ms 5836 KB Output is correct
37 Correct 6 ms 5836 KB Output is correct
38 Correct 6 ms 5836 KB Output is correct
39 Correct 264 ms 10584 KB Output is correct
40 Correct 258 ms 10776 KB Output is correct
41 Correct 273 ms 10692 KB Output is correct
42 Correct 257 ms 10796 KB Output is correct
43 Correct 117 ms 10888 KB Output is correct
44 Correct 107 ms 10740 KB Output is correct
45 Correct 175 ms 13400 KB Output is correct
46 Correct 123 ms 16364 KB Output is correct
47 Correct 270 ms 15828 KB Output is correct
48 Correct 345 ms 26864 KB Output is correct
49 Correct 309 ms 25976 KB Output is correct
50 Correct 286 ms 15600 KB Output is correct
51 Correct 271 ms 15708 KB Output is correct
52 Correct 287 ms 15820 KB Output is correct
53 Correct 476 ms 14600 KB Output is correct
54 Correct 214 ms 14512 KB Output is correct
55 Correct 34 ms 6636 KB Output is correct
56 Correct 21 ms 6348 KB Output is correct
57 Correct 185 ms 10896 KB Output is correct
58 Correct 58 ms 10800 KB Output is correct
59 Correct 542 ms 23316 KB Output is correct
60 Correct 1431 ms 43460 KB Output is correct
61 Correct 384 ms 15956 KB Output is correct
62 Correct 430 ms 15880 KB Output is correct
63 Correct 498 ms 15812 KB Output is correct
64 Correct 1401 ms 26588 KB Output is correct
65 Correct 267 ms 15556 KB Output is correct
66 Correct 925 ms 25344 KB Output is correct
67 Correct 156 ms 15924 KB Output is correct
68 Correct 616 ms 22768 KB Output is correct
69 Correct 544 ms 23048 KB Output is correct
70 Correct 519 ms 22196 KB Output is correct