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답안 #656611

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
656611 2022-11-08T02:26:54 Z Hiennoob123 공장들 (JOI14_factories) C++14
33 / 100
 8000 ms 262572 KB 
#include<bits/stdc++.h>
#include "factories.h"
#define ll long long
#define ld long double
#define cd complex<ld>
#define pll pair<ll,ll>
#define pii pair<int,int>
#define pld pair<ld,ld>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std ;
ll n ;
ll num = 700 ;
vector<pair<int , ll>> T[500005]  ;
int depth[500005] ;
ll dis[500005] ;
int lg2[1000005] ;
int Left[500005] ;
vector<int> euler ;
vector<pair<int , int>> sparse[20] ;
void build()
{
    for(int i = 0 ; i< 20 ; i++)
    {
        if((1<<i)>euler.size()) break ;
        if(i==0)
        {
            sparse[0].assign(euler.size() , {0 , 0}) ;
            for(int j = 0 ; j< euler.size() ; j++)
            {
                sparse[0][j] = {depth[euler[j]], euler[j]} ;
            }
        }
        else
        {
            sparse[i].assign(euler.size()+1-(1<<i) , {0 , 0}) ;
            for(int j = 0 ; j< euler.size()-(1<<i)+1 ; j++)
            {
                sparse[i][j] = min(sparse[i-1][j] , sparse[i-1][j+(1<<(i-1))]) ;
            }
        }
    }
}
ll LCA(ll u , ll v)
{
    u = Left[u] , v = Left[v] ;
    if(u>v) swap(u , v) ;
    int k = lg2[v-u+1] ;
    pair<int , ll> x = min(sparse[k][u] , sparse[k][v-(1<<k)+1]) ;
    return x.se ;
}
void dfs(ll v , ll par)
{
    Left[v] = euler.size() ;
    euler.push_back(v) ;
    for(int i = 0 ; i< T[v].size() ; i++)
    {
        if(T[v][i].fi==par) continue ;
        dis[T[v][i].fi] = T[v][i].se+dis[v] ;
        depth[T[v][i].fi] = depth[v]+1 ;
        dfs(T[v][i].fi , v) ;
        euler.push_back(v) ;
    }
}
void Init(int N, int A[], int B[], int D[])
{
    n = N ;
    num = n ;
    for(int i = 0 ; i< n-1 ; i++)
    {
        T[A[i]].push_back(mp(B[i] , D[i])) ;
        T[B[i]].push_back(mp(A[i] , D[i])) ;
    }
    for(int i = 2 ; i<= 1000000 ; i++) lg2[i] = lg2[i/2]+1 ;
    dfs(0 , -1);
    build() ;
}
ll distance(ll u , ll v)
{
    int k = LCA(u , v) ;
    //cout << u << " " << v << " " << k << "\n" ;
    //cout << dis[u]+dis[v]-2*dis[k] << "\n" ;
    return dis[u]+dis[v]-2*dis[k] ;
}
ll dist[500005] = {} ;
bool check[500005] = {} ;
ll Query(int N, int X[], int M, int Y[])
{
    //cout<< N << " " << M << "\n" ;
    //cout << num ;
    if(N*M>1000000)
    {
        for(int i = 0 ; i<= n ; i++)
        {
            dist[i] = LLONG_MAX ;
            check[i] = 0 ;
        }
        priority_queue<pll , vector<pll> , greater<pll>> q ;
        for(int i = 0 ; i< N ;i++)
        {
            dist[X[i]] = 0 ;
            q.push(mp(0 , X[i])) ;
        }
        while(!q.empty())
        {
            ll le = q.top().fi , x = q.top().se;
            q.pop() ;
            //cout << le << " " << x << "\n" ;
            if(le!=dist[x]||check[x]) continue ;
            check[x] = 1 ;
            //cout << T[x][0].fi << "\n" ;
            for(int i = 0 ; i< T[x].size() ; i++)
            {
                if(dist[T[x][i].fi]>T[x][i].se+le)
                {
                    dist[T[x][i].fi] = T[x][i].se+le ;
                    q.push(mp(dist[T[x][i].fi] , T[x][i].fi)) ;
                }
            }
        }
        ll ans = LLONG_MAX ;
        for(int i = 0 ; i< M ; i++)
        {
            ans = min(ans , dist[Y[i]]) ;
        }
        return ans ;
    }
    else
    {
        ll ans = LLONG_MAX ;
        for(int i = 0 ; i< N ; i++)
        {
            for(int j = 0 ; j< M ; j++)
            {
                ans = min(ans , distance(X[i] , Y[j])) ;
            }
        }
        return ans ;
    }
    return 0;
}

Compilation message

factories.cpp: In function 'void build()':
factories.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         if((1<<i)>euler.size()) break ;
      |            ~~~~~~^~~~~~~~~~~~~
factories.cpp:31:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             for(int j = 0 ; j< euler.size() ; j++)
      |                             ~^~~~~~~~~~~~~~
factories.cpp:39:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |             for(int j = 0 ; j< euler.size()-(1<<i)+1 ; j++)
      |                             ~^~~~~~~~~~~~~~~~~~~~~~~
factories.cpp: In function 'void dfs(long long int, long long int)':
factories.cpp:58:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i = 0 ; i< T[v].size() ; i++)
      |                     ~^~~~~~~~~~~~~
factories.cpp: In function 'long long int Query(int, int*, int, int*)':
factories.cpp:114:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  114 |             for(int i = 0 ; i< T[x].size() ; i++)
      |                             ~^~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 16340 KB Output is correct
2 Correct 5386 ms 25436 KB Output is correct
3 Correct 3024 ms 25420 KB Output is correct
4 Correct 2158 ms 25708 KB Output is correct
5 Correct 3818 ms 26116 KB Output is correct
6 Correct 3563 ms 25656 KB Output is correct
7 Correct 2744 ms 25372 KB Output is correct
8 Correct 1942 ms 25464 KB Output is correct
9 Correct 3870 ms 26008 KB Output is correct
10 Correct 3509 ms 25808 KB Output is correct
11 Correct 2769 ms 25512 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 16212 KB Output is correct
2 Correct 850 ms 214740 KB Output is correct
3 Correct 969 ms 220328 KB Output is correct
4 Correct 692 ms 212576 KB Output is correct
5 Correct 879 ms 262572 KB Output is correct
6 Correct 878 ms 221548 KB Output is correct
7 Correct 801 ms 61424 KB Output is correct
8 Correct 504 ms 61216 KB Output is correct
9 Correct 550 ms 67408 KB Output is correct
10 Correct 589 ms 62676 KB Output is correct

Subtask #3
0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 16340 KB Output is correct
2 Correct 5386 ms 25436 KB Output is correct
3 Correct 3024 ms 25420 KB Output is correct
4 Correct 2158 ms 25708 KB Output is correct
5 Correct 3818 ms 26116 KB Output is correct
6 Correct 3563 ms 25656 KB Output is correct
7 Correct 2744 ms 25372 KB Output is correct
8 Correct 1942 ms 25464 KB Output is correct
9 Correct 3870 ms 26008 KB Output is correct
10 Correct 3509 ms 25808 KB Output is correct
11 Correct 2769 ms 25512 KB Output is correct
12 Correct 10 ms 16212 KB Output is correct
13 Correct 850 ms 214740 KB Output is correct
14 Correct 969 ms 220328 KB Output is correct
15 Correct 692 ms 212576 KB Output is correct
16 Correct 879 ms 262572 KB Output is correct
17 Correct 878 ms 221548 KB Output is correct
18 Correct 801 ms 61424 KB Output is correct
19 Correct 504 ms 61216 KB Output is correct
20 Correct 550 ms 67408 KB Output is correct
21 Correct 589 ms 62676 KB Output is correct
22 Execution timed out 8103 ms 224284 KB Time limit exceeded
23 Halted 0 ms 0 KB -