oj.uz

답안 #1108351

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1108351 2024-11-03T22:35:03 Z SteveBro 경주 (Race) (IOI11_race) C++17
9 / 100
 3000 ms 51084 KB 
#include <bits/stdc++.h>

using namespace std;
int mat[200001][2],ll[200001],p;
const int inf=1e9;
struct ura
{
    int t,s;
    bool ok;
}v[200001];
vector < pair<int,int> > g[200001];
int sol;
void dfs(int nod, int n)
{
    bool ok=true;
    v[nod].s=1;
    for(auto x : g[nod])
    {
        if(!v[x.first].ok&&v[nod].t!=x.first)
        {
            v[x.first].t=nod;
            dfs(x.first,n);
            v[nod].s+=v[x.first].s;
            if(v[x.first].s>n/2)
                ok=false;
        }
    }
    if(n-v[nod].s>n/2)
        ok=false;
    if(ok)
        sol=nod;
}
unordered_map <long long,int> maph;
std :: unordered_map <long long,int> :: iterator it;
int rez=inf;
void dfs1(int nod, long long d, int nrm)
{
    it=maph.find(p-d);
    if(it!=maph.end())
        rez=min(rez,(*it).second+nrm);
    for(auto x : g[nod])
    {
        if(!v[x.first].ok&&x.first!=v[nod].t)
        {
            v[x.first].t=nod;
            dfs1(x.first,d+x.second,nrm+1);
        }
    }
}
void dfs2(int nod, long long d, int nrm)
{
    it=maph.find(d);
    if(it==maph.end())
        maph.insert(make_pair(d,nrm));
    else
        maph.at(d)=min(maph.at(d),nrm);
    for(auto x : g[nod])
    {
        if(!v[x.first].ok&&x.first!=v[nod].t)
        {
            v[x.first].t=nod;
            dfs2(x.first,d+x.second,nrm+1);
        }
    }
}
void divide(int nod, int nr)
{
    if(nr==1)
        return;
    maph.clear();
    maph.insert(make_pair(0,0));
    v[nod].t=-1;
    dfs(nod,nr);
    int ctd=sol;
    for(auto x : g[ctd])
    {
        if(!v[x.first].ok)
        {
            v[x.first].t=ctd;
            dfs1(x.first,x.second,1);
            dfs2(x.first,x.second,1);
        }
    }
    v[ctd].ok=true;
    for(auto x : g[ctd])
    {
        if(!v[x.first].ok)
        {
            v[x.first].t=ctd;
            divide(x.first,v[x.first].s);
        }
    }
}
int best_path(int n,int k,int h[][2],int l[])
{
    int i;
    for(i=0;i<n-1;i++)
    {
        g[h[i][0]].push_back(make_pair(h[i][1],l[i]));
        g[h[i][1]].push_back(make_pair(h[i][0],l[i]));
    }
    p=k;
    v[1].t=n;
    divide(1,n);
    if(rez==inf)
        rez=-1;
    return rez;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12624 KB Output is correct
2 Correct 2 ms 12624 KB Output is correct
3 Correct 2 ms 12740 KB Output is correct
4 Correct 3 ms 12624 KB Output is correct
5 Correct 2 ms 12624 KB Output is correct
6 Correct 2 ms 12624 KB Output is correct
7 Correct 2 ms 12624 KB Output is correct
8 Correct 3 ms 12624 KB Output is correct
9 Correct 2 ms 12624 KB Output is correct
10 Correct 3 ms 12624 KB Output is correct
11 Correct 2 ms 12624 KB Output is correct
12 Correct 2 ms 12624 KB Output is correct
13 Correct 3 ms 12640 KB Output is correct
14 Correct 2 ms 12624 KB Output is correct
15 Correct 3 ms 12624 KB Output is correct
16 Correct 2 ms 12624 KB Output is correct
17 Correct 2 ms 12624 KB Output is correct
18 Correct 2 ms 12624 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12624 KB Output is correct
2 Correct 2 ms 12624 KB Output is correct
3 Correct 2 ms 12740 KB Output is correct
4 Correct 3 ms 12624 KB Output is correct
5 Correct 2 ms 12624 KB Output is correct
6 Correct 2 ms 12624 KB Output is correct
7 Correct 2 ms 12624 KB Output is correct
8 Correct 3 ms 12624 KB Output is correct
9 Correct 2 ms 12624 KB Output is correct
10 Correct 3 ms 12624 KB Output is correct
11 Correct 2 ms 12624 KB Output is correct
12 Correct 2 ms 12624 KB Output is correct
13 Correct 3 ms 12640 KB Output is correct
14 Correct 2 ms 12624 KB Output is correct
15 Correct 3 ms 12624 KB Output is correct
16 Correct 2 ms 12624 KB Output is correct
17 Correct 2 ms 12624 KB Output is correct
18 Correct 2 ms 12624 KB Output is correct
19 Incorrect 2 ms 12752 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12624 KB Output is correct
2 Correct 2 ms 12624 KB Output is correct
3 Correct 2 ms 12740 KB Output is correct
4 Correct 3 ms 12624 KB Output is correct
5 Correct 2 ms 12624 KB Output is correct
6 Correct 2 ms 12624 KB Output is correct
7 Correct 2 ms 12624 KB Output is correct
8 Correct 3 ms 12624 KB Output is correct
9 Correct 2 ms 12624 KB Output is correct
10 Correct 3 ms 12624 KB Output is correct
11 Correct 2 ms 12624 KB Output is correct
12 Correct 2 ms 12624 KB Output is correct
13 Correct 3 ms 12640 KB Output is correct
14 Correct 2 ms 12624 KB Output is correct
15 Correct 3 ms 12624 KB Output is correct
16 Correct 2 ms 12624 KB Output is correct
17 Correct 2 ms 12624 KB Output is correct
18 Correct 2 ms 12624 KB Output is correct
19 Correct 129 ms 19792 KB Output is correct
20 Correct 131 ms 19984 KB Output is correct
21 Correct 119 ms 20012 KB Output is correct
22 Correct 105 ms 20048 KB Output is correct
23 Correct 79 ms 20304 KB Output is correct
24 Correct 48 ms 20176 KB Output is correct
25 Correct 190 ms 27976 KB Output is correct
26 Correct 73 ms 28744 KB Output is correct
27 Correct 172 ms 25588 KB Output is correct
28 Execution timed out 3072 ms 51084 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12624 KB Output is correct
2 Correct 2 ms 12624 KB Output is correct
3 Correct 2 ms 12740 KB Output is correct
4 Correct 3 ms 12624 KB Output is correct
5 Correct 2 ms 12624 KB Output is correct
6 Correct 2 ms 12624 KB Output is correct
7 Correct 2 ms 12624 KB Output is correct
8 Correct 3 ms 12624 KB Output is correct
9 Correct 2 ms 12624 KB Output is correct
10 Correct 3 ms 12624 KB Output is correct
11 Correct 2 ms 12624 KB Output is correct
12 Correct 2 ms 12624 KB Output is correct
13 Correct 3 ms 12640 KB Output is correct
14 Correct 2 ms 12624 KB Output is correct
15 Correct 3 ms 12624 KB Output is correct
16 Correct 2 ms 12624 KB Output is correct
17 Correct 2 ms 12624 KB Output is correct
18 Correct 2 ms 12624 KB Output is correct
19 Incorrect 2 ms 12752 KB Output isn't correct
20 Halted 0 ms 0 KB -