제출 #296684

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
296684		muhammad_hokimiyon	늑대인간 (IOI18_werewolf)	C++14	7 / 100	4057 ms	93816 KiB

werewolf

#include "werewolf.h"
#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define ll long long
#define dl double long

const int maxn = 200200;

int n,m,q;
int tim;
int t[4 * maxn];
int tin1[maxn];
int tout1[maxn];
int tin2[maxn];
int tout2[maxn];
int o1[maxn];
int o2[maxn];
int p[maxn];
int d1[maxn][25];
int d2[maxn][25];
vector < int > g[maxn];
vector < int > v[maxn];
vector < pair < int , int > > gg[maxn];

void upd( int x , int l , int r , int p , int val )
{
    if( l == r ){
        t[x] = val;
        return;
    }
    int m = (l + r) / 2;
    if( p <= m )upd( x + x , l , m , p , val );
    else upd( x + x + 1 , m + 1 , r , p , val );
    t[x] = max( t[x + x] , t[x + x + 1] );
}

int get( int x , int l , int r , int tl , int tr )
{
    if( tl > tr )return -1;
    if( l == tl && r == tr )return t[x];
    int m = (l + r) / 2;
    return max( get( x + x , l , m , tl , min( tr , m ) ) ,
               get( x + x + 1 , m + 1 , r , max( tl , m + 1 ) , tr ) );
}

int get( int x )
{
    return (p[x] == x ? x : p[x] = get(p[x]));
}

void meg( int x , int y )
{
    int px = get(x);
    int py = get(y);
    if( px == py )return;
    p[px] = py;
    g[py].push_back(px);
    g[px].push_back(py);
}

void dfs( int x , int p )
{
    d1[x][0] = p;
    for( int i = 1; i < 25; i++ ){
        d1[x][i] = d1[d1[x][i - 1]][i - 1];
    }
    tin1[x] = ++tim;
    o1[tim] = x;
    for( auto y : g[x] ){
        if( y == p )continue;
        dfs( y , x );
    }
    tout1[x] = tim;
}

int ff( int x , int y )
{
    for( int i = 24; i >= 0; i-- ){
        if( d2[x][i] <= y ){
            x = d2[x][i];
        }
    }
    return x;
}

int ff1( int x , int y )
{
    for( int i = 24; i >= 0; i-- ){
        if( d1[x][i] >= y ){
            x = d1[x][i];
        }
    }
    return x;
}

vector<int> check_validity(int N, vector<int> X, vector<int> Y,vector<int> S, vector<int> E,
                           vector<int> L, vector<int> R)
{
    n = N;
    m = (int)X.size();
    q = (int)S.size();
    for( int i = 1; i <= n; i++ ){
        p[i] = i;
    }
    for( int i = 0; i < m; i++ ){
        v[X[i]].push_back(Y[i]);
        v[Y[i]].push_back(X[i]);
    }
    for( int i = 0; i < n; i++ ){
        for( auto x : v[i] ){
            if( x > i )continue;
            meg( x , i );
        }
    }
    dfs( n - 1 , n - 1 );
    for( int i = 0; i <= n; i++ ){
        tin2[i] = tin1[i];
        tout2[i] = tout1[i];
        o2[i] = o1[i];
        g[i].clear();
        p[i] = i;
        for( int j = 0; j < 25; j++ ){
            d2[i][j] = d1[i][j];
        }
    }
    tim = 0;
    for( int i = n - 1; i >= 0; i-- ){
        for( auto x : v[i] ){
            if( x < i )continue;
            meg( x , i );
        }
    }
    dfs( 0 , 0 );
    for( int i = 0; i < q; i++ ){
        gg[R[i]].push_back({L[i] , i});
    }
    vector < int > ans(q , -1);
    for( int i = 0; i <= n; i++ ){
        //upd( 1 , 0 , n , tin1[i] , tin2[i] );
        for( auto x : gg[i] ){
            int yy = ff( E[x.se] , i );
            int y = ff1( S[x.se] , x.fi );
            bool f = false;
            for( int i1 = tin2[yy]; i1 <= tout2[yy]; i1++ ){
                for( int j1 = tin1[y]; j1 <= tout1[y]; j1++ ){
                    if( o2[i1] < x.fi || o2[i1] > i || o1[j1] < x.fi || o1[j1] > i )continue;
                    f |= ( o2[i1] == o1[j1] );
                }
            }
            ans[x.se] = f;
        }
    }
    return ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51