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답안 #392408

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
392408 2021-04-21T04:22:35 Z Hazem 경주 (Race) (IOI11_race) C++14
100 / 100
 852 ms 109672 KB 
#include <bits/stdc++.h>
//#include "race.h"
//#include "grader.h"

using namespace std;
 
#define S second
#define F first
#define LL long long 
 
const int N1 = 2e5+10;
const LL MOD = 1e9+7;
const LL LINF = 1e18;
const LL INF = 1e9;

map<LL,int> *mp[N1];
vector<pair<int,LL>>adj[N1];
LL depth[N1],dis[N1],sizes[N1],in[N1],out[N1],ans[N1];
vector<int>vec;

LL get_mn(LL x,int i){

    if((*mp[i]).find(x)!=(*mp[i]).end())
        return (*mp[i])[x];
    else 
        return LINF;
}

void update(LL x,LL val,int i){

    if((*mp[i]).find(x)!=(*mp[i]).end())
        (*mp[i])[x] = min(1ll*(*mp[i])[x],val);
    else 
        (*mp[i])[x] = val;
}

map<LL,int>mp1;

void dfs(int i,int pr,int k){

    in[i] = vec.size();
    vec.push_back(i);

    mp[i] = new map<LL,int>;

    sizes[i] = 1;
    int heavy = -1;
    for(auto x:adj[i]){
        if(x.F==pr)continue;
        
        depth[x.F] = depth[i]+1;
        dis[x.F] = dis[i]+x.S;
        
        dfs(x.F,i,k);
        
        sizes[i] += sizes[x.F];
        if(heavy==-1||sizes[x.F]>sizes[heavy])
            heavy = x.F;
    }
    
    if(heavy==-1)heavy = i;
    mp[i] = mp[heavy];

    out[i] = vec.size();
    vec.push_back(i);

    ans[i] = get_mn(k+dis[i],i)-depth[i];
    for(auto x:adj[i]){

        int u = x.F;
        if(u==pr||u==heavy)continue;
        
        for(int j=in[u];j<=out[u];j++){
            
            int v = vec[j];
            ans[i] = min(ans[i],depth[v]+get_mn(k-dis[v]+dis[i]*2,i)-depth[i]*2);
            
            if(dis[v]-dis[i]==k)
                ans[i] = min(ans[i],depth[v]-depth[i]);
        }

        for(int j=in[u];j<=out[u];j++)
            update(dis[vec[j]],depth[vec[j]],i);
    }
    update(dis[i],depth[i],i);
}

int best_path(int N, int K, int H[][2], int L[])
{
    int n = N;
    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(0,0,K);
    LL ans1 = LINF;
    for(int i=0;i<n;i++)
        ans1 = min(ans1,ans[i]);
    
    return ans1<n?ans1:-1;
}

/*

#define MAX_N 500000

static int N, K;
static int H[MAX_N][2];
static int L[MAX_N];
static int solution;

inline 
void my_assert(int e) {if (!e) abort();}
void read_input()
{
  int i;
  my_assert(2==scanf("%d %d",&N,&K));
  for(i=0; i<N-1; i++)
    my_assert(3==scanf("%d %d %d",&H[i][0],&H[i][1],&L[i]));
  my_assert(1==scanf("%d",&solution));
}

int main()
{
  int ans1;
  read_input();
  ans1 = best_path(N,K,H,L);
  if(ans1==solution)
    printf("Correct.\n");
  else
    printf("Incorrect. Returned %d, Expected %d.\n",ans1,solution);

  return 0;
}*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 3 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 3 ms 5068 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 5068 KB Output is correct
16 Correct 3 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 3 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 3 ms 5068 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 5068 KB Output is correct
16 Correct 3 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 3 ms 5072 KB Output is correct
20 Correct 3 ms 5068 KB Output is correct
21 Correct 5 ms 5324 KB Output is correct
22 Correct 6 ms 5472 KB Output is correct
23 Correct 5 ms 5452 KB Output is correct
24 Correct 5 ms 5324 KB Output is correct
25 Correct 5 ms 5324 KB Output is correct
26 Correct 5 ms 5452 KB Output is correct
27 Correct 4 ms 5324 KB Output is correct
28 Correct 5 ms 5324 KB Output is correct
29 Correct 5 ms 5444 KB Output is correct
30 Correct 6 ms 5452 KB Output is correct
31 Correct 5 ms 5452 KB Output is correct
32 Correct 5 ms 5324 KB Output is correct
33 Correct 5 ms 5452 KB Output is correct
34 Correct 6 ms 5324 KB Output is correct
35 Correct 5 ms 5268 KB Output is correct
36 Correct 5 ms 5324 KB Output is correct
37 Correct 5 ms 5324 KB Output is correct
38 Correct 5 ms 5324 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 3 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 3 ms 5068 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 5068 KB Output is correct
16 Correct 3 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 231 ms 34928 KB Output is correct
20 Correct 230 ms 34936 KB Output is correct
21 Correct 236 ms 35024 KB Output is correct
22 Correct 227 ms 34960 KB Output is correct
23 Correct 344 ms 48680 KB Output is correct
24 Correct 233 ms 40760 KB Output is correct
25 Correct 138 ms 30608 KB Output is correct
26 Correct 69 ms 37304 KB Output is correct
27 Correct 281 ms 58976 KB Output is correct
28 Correct 329 ms 82356 KB Output is correct
29 Correct 338 ms 81360 KB Output is correct
30 Correct 274 ms 58672 KB Output is correct
31 Correct 302 ms 58692 KB Output is correct
32 Correct 404 ms 58812 KB Output is correct
33 Correct 426 ms 57476 KB Output is correct
34 Correct 631 ms 90188 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 3 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 3 ms 5068 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 5068 KB Output is correct
16 Correct 3 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 3 ms 5072 KB Output is correct
20 Correct 3 ms 5068 KB Output is correct
21 Correct 5 ms 5324 KB Output is correct
22 Correct 6 ms 5472 KB Output is correct
23 Correct 5 ms 5452 KB Output is correct
24 Correct 5 ms 5324 KB Output is correct
25 Correct 5 ms 5324 KB Output is correct
26 Correct 5 ms 5452 KB Output is correct
27 Correct 4 ms 5324 KB Output is correct
28 Correct 5 ms 5324 KB Output is correct
29 Correct 5 ms 5444 KB Output is correct
30 Correct 6 ms 5452 KB Output is correct
31 Correct 5 ms 5452 KB Output is correct
32 Correct 5 ms 5324 KB Output is correct
33 Correct 5 ms 5452 KB Output is correct
34 Correct 6 ms 5324 KB Output is correct
35 Correct 5 ms 5268 KB Output is correct
36 Correct 5 ms 5324 KB Output is correct
37 Correct 5 ms 5324 KB Output is correct
38 Correct 5 ms 5324 KB Output is correct
39 Correct 231 ms 34928 KB Output is correct
40 Correct 230 ms 34936 KB Output is correct
41 Correct 236 ms 35024 KB Output is correct
42 Correct 227 ms 34960 KB Output is correct
43 Correct 344 ms 48680 KB Output is correct
44 Correct 233 ms 40760 KB Output is correct
45 Correct 138 ms 30608 KB Output is correct
46 Correct 69 ms 37304 KB Output is correct
47 Correct 281 ms 58976 KB Output is correct
48 Correct 329 ms 82356 KB Output is correct
49 Correct 338 ms 81360 KB Output is correct
50 Correct 274 ms 58672 KB Output is correct
51 Correct 302 ms 58692 KB Output is correct
52 Correct 404 ms 58812 KB Output is correct
53 Correct 426 ms 57476 KB Output is correct
54 Correct 631 ms 90188 KB Output is correct
55 Correct 26 ms 9136 KB Output is correct
56 Correct 15 ms 7764 KB Output is correct
57 Correct 148 ms 35304 KB Output is correct
58 Correct 83 ms 30816 KB Output is correct
59 Correct 99 ms 43572 KB Output is correct
60 Correct 322 ms 81456 KB Output is correct
61 Correct 381 ms 62240 KB Output is correct
62 Correct 269 ms 58648 KB Output is correct
63 Correct 353 ms 58736 KB Output is correct
64 Correct 852 ms 109168 KB Output is correct
65 Correct 815 ms 109672 KB Output is correct
66 Correct 374 ms 79456 KB Output is correct
67 Correct 263 ms 57852 KB Output is correct
68 Correct 572 ms 76660 KB Output is correct
69 Correct 535 ms 77248 KB Output is correct
70 Correct 514 ms 73356 KB Output is correct