oj.uz

답안 #1091293

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1091293 2024-09-20T12:07:48 Z vivkostov 경주 (Race) (IOI11_race) C++14
100 / 100
 1690 ms 81488 KB 
#include <bits/stdc++.h>
//#include "race.h"
using namespace std;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
struct cell
{
    long long int a,b,c;
    void read()
    {
        cin>>a>>b>>c;
    }
};
long long int n,k,used[200005],dp[200005];
cell a[200005];
vector<cell>v[200005];
map<long long int,long long int>m,ne;
long long int otg;
void make_dp(long long int beg,int par)
{
    long long int w;
    dp[beg]=1;
    for(long long int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i].b;
        if(!used[w]&&w!=par)
        {
            make_dp(w,beg);
            dp[beg]+=dp[w];
        }
    }
}
void cl(long long int beg,long long int par)
{
    long long int w;
    used[beg]=0;
    for(long long int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i].b;
        if(w!=par&&used[w]!=2)cl(w,beg);
    }
}
void cdp(int beg,int par)
{
    int w;
    dp[beg]=0;
    for(int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i].b;
        if(!used[w]&&w!=par)cdp(w,beg);
    }
}
void dfs(long long int beg,long long int st,long long int lead,long long int br)
{
    if(st>k)return;
    used[beg]=1;
    cell w;
    if(!ne[st])
    {
        ne[st]=br;
    }
    else ne[st]=min(ne[st],br);
    for(long long int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i];
        if(!used[w.b])
        {
            dfs(w.b,st+w.c,lead,br+1);
        }
        if(beg==lead)
        {
            for(auto j=ne.begin();j!=ne.end();j++)
            {
                long long int h=j->first;
                if(k==h)otg=min(otg,j->second);
                if(m[k-h])
                {
                    otg=min(otg,m[k-h]+j->second);
                }
            }
            for(auto j=ne.begin();j!=ne.end();j++)
            {
                long long int h=j->first;
                if(m[h])m[h]=min(m[h],ne[h]);
                else m[h]=ne[h];
            }
            ne.clear();
        }
    }
}
void find_centroid(long long int beg,long long int par,long long int br)
{
    long long int w,l=0;
    used[beg]=1;
    for(long long int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i].b;
        if(!used[w]&&dp[w]>=(br+1)/2)
        {
            find_centroid(w,beg,br);
            l=1;
        }
    }
    if(!l)
    {
        cl(beg,beg);
        dfs(beg,0,beg,0);
        m.clear();
        cl(beg,beg);
        cdp(beg,beg);
        used[beg]=2;
        for(long long int i=0;i<v[beg].size();i++)
        {
            w=v[beg][i].b;
            if(!used[w])
            {
                make_dp(w,beg);
                cl(w,w);
                find_centroid(w,w,dp[w]);
            }
        }
    }
}
int best_path(int N,int K,int H[][2],int L[])
//void read()
{
    //cin>>n>>k;
    n=N;
    k=K;
    for(long long int i=1;i<n;i++)
    {
        //cin>>a[i].a>>a[i].b;
        a[i].a=H[i-1][0];
        a[i].b=H[i-1][1];
    }
    for(long long int i=1;i<n;i++)
    {
        //cin>> a[i].c;
        a[i].c=L[i-1];
        v[a[i].a].push_back(a[i]);
        swap(a[i].a,a[i].b);
        v[a[i].a].push_back(a[i]);
    }
    //cout<<endl;
    otg=1000000000;
    make_dp(0,0);
    find_centroid(0,0,dp[0]);
    if(otg==1000000000)
    {
        //cout<<-1<<endl;
        return -1;
    }
    return otg;
    //cout<<otg<<endl;
}
/*int main()
{
    speed();
    read();
    return  0;
}
*/

Compilation message

race.cpp: In function 'void make_dp(long long int, int)':
race.cpp:27:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(long long int i=0;i<v[beg].size();i++)
      |                           ~^~~~~~~~~~~~~~
race.cpp: In function 'void cl(long long int, long long int)':
race.cpp:41:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(long long int i=0;i<v[beg].size();i++)
      |                           ~^~~~~~~~~~~~~~
race.cpp: In function 'void cdp(int, int)':
race.cpp:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<v[beg].size();i++)
      |                 ~^~~~~~~~~~~~~~
race.cpp: In function 'void dfs(long long int, long long int, long long int, long long int)':
race.cpp:67:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(long long int i=0;i<v[beg].size();i++)
      |                           ~^~~~~~~~~~~~~~
race.cpp: In function 'void find_centroid(long long int, long long int, long long int)':
race.cpp:99:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |     for(long long int i=0;i<v[beg].size();i++)
      |                           ~^~~~~~~~~~~~~~
race.cpp:116:32: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<cell>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  116 |         for(long long int i=0;i<v[beg].size();i++)
      |                               ~^~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 5144 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 3 ms 5028 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 5208 KB Output is correct
13 Correct 3 ms 4952 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 5144 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 3 ms 5028 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 5208 KB Output is correct
13 Correct 3 ms 4952 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4952 KB Output is correct
21 Correct 4 ms 5164 KB Output is correct
22 Correct 3 ms 5208 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 3 ms 6748 KB Output is correct
25 Correct 5 ms 5192 KB Output is correct
26 Correct 3 ms 5212 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 4 ms 5212 KB Output is correct
29 Correct 4 ms 5212 KB Output is correct
30 Correct 6 ms 5212 KB Output is correct
31 Correct 5 ms 5212 KB Output is correct
32 Correct 5 ms 5212 KB Output is correct
33 Correct 5 ms 5212 KB Output is correct
34 Correct 4 ms 5212 KB Output is correct
35 Correct 4 ms 5160 KB Output is correct
36 Correct 3 ms 5212 KB Output is correct
37 Correct 4 ms 5212 KB Output is correct
38 Correct 4 ms 5416 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 5144 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 3 ms 5028 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 5208 KB Output is correct
13 Correct 3 ms 4952 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 291 ms 17940 KB Output is correct
20 Correct 289 ms 19724 KB Output is correct
21 Correct 295 ms 19540 KB Output is correct
22 Correct 251 ms 19540 KB Output is correct
23 Correct 151 ms 20308 KB Output is correct
24 Correct 96 ms 18772 KB Output is correct
25 Correct 209 ms 23380 KB Output is correct
26 Correct 119 ms 30288 KB Output is correct
27 Correct 251 ms 33108 KB Output is correct
28 Correct 466 ms 47952 KB Output is correct
29 Correct 455 ms 46912 KB Output is correct
30 Correct 250 ms 33104 KB Output is correct
31 Correct 260 ms 33108 KB Output is correct
32 Correct 276 ms 33104 KB Output is correct
33 Correct 507 ms 32596 KB Output is correct
34 Correct 310 ms 33260 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 5144 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 3 ms 5028 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 5208 KB Output is correct
13 Correct 3 ms 4952 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4952 KB Output is correct
21 Correct 4 ms 5164 KB Output is correct
22 Correct 3 ms 5208 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 3 ms 6748 KB Output is correct
25 Correct 5 ms 5192 KB Output is correct
26 Correct 3 ms 5212 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 4 ms 5212 KB Output is correct
29 Correct 4 ms 5212 KB Output is correct
30 Correct 6 ms 5212 KB Output is correct
31 Correct 5 ms 5212 KB Output is correct
32 Correct 5 ms 5212 KB Output is correct
33 Correct 5 ms 5212 KB Output is correct
34 Correct 4 ms 5212 KB Output is correct
35 Correct 4 ms 5160 KB Output is correct
36 Correct 3 ms 5212 KB Output is correct
37 Correct 4 ms 5212 KB Output is correct
38 Correct 4 ms 5416 KB Output is correct
39 Correct 291 ms 17940 KB Output is correct
40 Correct 289 ms 19724 KB Output is correct
41 Correct 295 ms 19540 KB Output is correct
42 Correct 251 ms 19540 KB Output is correct
43 Correct 151 ms 20308 KB Output is correct
44 Correct 96 ms 18772 KB Output is correct
45 Correct 209 ms 23380 KB Output is correct
46 Correct 119 ms 30288 KB Output is correct
47 Correct 251 ms 33108 KB Output is correct
48 Correct 466 ms 47952 KB Output is correct
49 Correct 455 ms 46912 KB Output is correct
50 Correct 250 ms 33104 KB Output is correct
51 Correct 260 ms 33108 KB Output is correct
52 Correct 276 ms 33104 KB Output is correct
53 Correct 507 ms 32596 KB Output is correct
54 Correct 310 ms 33260 KB Output is correct
55 Correct 31 ms 8284 KB Output is correct
56 Correct 20 ms 8024 KB Output is correct
57 Correct 155 ms 18524 KB Output is correct
58 Correct 44 ms 16644 KB Output is correct
59 Correct 597 ms 40676 KB Output is correct
60 Correct 1690 ms 81488 KB Output is correct
61 Correct 384 ms 33624 KB Output is correct
62 Correct 443 ms 33760 KB Output is correct
63 Correct 477 ms 33612 KB Output is correct
64 Correct 1436 ms 48464 KB Output is correct
65 Correct 295 ms 33648 KB Output is correct
66 Correct 1085 ms 45064 KB Output is correct
67 Correct 112 ms 31468 KB Output is correct
68 Correct 564 ms 42324 KB Output is correct
69 Correct 562 ms 42068 KB Output is correct
70 Correct 561 ms 40752 KB Output is correct