Submission #287302

#	Time	Username	Problem	Language	Result	Execution time	Memory
287302		infinite_iq	Werewolf (IOI18_werewolf)	C++14	0 / 100	4091 ms	53240 KiB

werewolf

#include <bits/stdc++.h>
using namespace std ;
#define pb push_back
#define C continue 
#define lb lower_bound
#define ub upper_bound
#define ins insert 
#define era erase 
typedef vector < int > vi ;
#include "werewolf.h"
int n , m , q ;
vi v [200009] , ans ;
int a [200009] , pos [200009] ;
int stop [200009][2][2] ;
void dfs ( int node , int p , int ord ) {
        a [ord] = node ;
        for ( auto u : v [node] ) {
                if ( u == p ) C ;
                dfs ( u , node , ord + 1 ) ;
        }
}
int query ( int node , int l , int r , int s , int e , int x ) {
        int mn =1e9 ;
        for ( int i = l ; i <= r ; i ++ ) {
                if ( a [i] >= x ) {
                        mn = min ( mn , a [i] ) ;
                }
        }
        return mn ;
}
vi check_validity ( int N , vi X , vi Y, vi S, vi E , vi L , vi R ) {
        n = N , m = X .size () , q = S .size () ;
        for ( int i = 0 ; i < m ; i ++ ) {
                int a = X [i] , b = Y [i] ;
                v [a] .pb ( b ) ;
                v [b] .pb ( a ) ;
        }
        for ( int i = 0 ; i < n ; i ++ ) {
                if ( v [i] .size () == 1 ) {
                        dfs ( i , i , 0 ) ;
                        break ;
                }
        }
//      build ( 1 , 0 , n -1 ) ; 
        set < int > s ;
        for ( int i = 0 ; i < n ; i ++ ) {
                pos [ a [i] ] = i ;
                v [i] .clear () ;
                s .ins ( i ) ;
        }
        for ( int i = 0 ; i < q ; i ++ ) {
                v [ R [i] ] .pb ( i ) ;
                swap ( S [i] , E [i] ) ;
        }
        for ( int i = 0 ; i < n ; i ++ ) {
                s .era ( pos [i] ) ;
                for ( auto u : v [i] ) {
                        int l = pos[S [u]] , r = pos [E [u]] , id = u ;
                        if ( l > r ) swap ( l , r ) ;
                        auto it = s .lb ( l ) ;
                        stop [id][0][0] = ( it == s.end () ? r : min ( (int)(*it -1) , r ) ) ;
                        it = s .ub ( r ) ;
                        stop [id][0][1] = ( it == s.begin () ? l : max ( (int)(*(--it) + 1) , l ) ) ;
                }
        }
        for ( int i = 0 ; i < n ; i ++ ) {
                v [i] .clear () ;
                s .ins ( i ) ;
        }
        for ( int i = 0 ; i < q ; i ++ ) {
                v [ L [i] ] .pb ( i ) ;
        }
        for ( int i = n - 1 ; i >= 0 ; i -- ) {
                s .era ( pos [i] ) ;
                for ( auto u : v [i] ) {
                        int l = pos [S [u]] , r = pos [E [u]] , id = u ;
                        if ( l > r ) swap ( l , r ) ;
                        auto it = s .lb ( l ) ;
                        stop [id][1][0] = ( it == s.end () ? r : min ( (int)(*it -1) , r ) ) ;
                        it = s .ub ( r ) ;
                        stop [id][1][1] = ( it == s.begin () ? l : max ( (int)(*(--it) + 1) , l ) ) ;
                }
        }
        for ( int i = 0 ; i < q ; i ++ ) {
                int st = pos [S [i]] , en = pos [E [i]] ;
                if ( st <= en ) {
                        int bound1 = stop [i][0][0] ;
                        int bound2 = stop [i][1][1] ;
                        if ( bound1 < st || bound2 > en || bound1 < bound2 ) {
                                ans .pb ( 0 ) ;
                                C ;
                        }
                        int l = bound2 , r = bound1 ;
                        ans .pb ( ( query ( 1 , 0 , n-1 , l , r , L [i] ) <= R [i] ) ) ;
                }
                else {
                        int bound1 = stop [i][0][1] ;
                        int bound2 = stop [i][1][0] ;
                        if ( bound1 > st || bound2 < en || bound2 < bound1 ) {
                                ans .pb ( 0 ) ;
                                C ;
                        }
                        int l = bound1 , r = bound2 ;
                        ans .pb ( ( query ( 1 , 0 , n-1 , l , r , L [i] ) <= R [i] ) ) ;
                }
        }
        return ans ;
}

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