oj.uz

답안 #308724

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
308724 2020-10-01T18:15:56 Z CaroLinda 식물 비교 (IOI20_plants) C++14
27 / 100
 831 ms 58284 KB 
#include "plants.h"
#include <bits/stdc++.h>

#define sz(x) (int)(x.size())
#define debug printf
#define lp(i,a,b) for(int i = a ; i < b; i++)
#define pb push_back
#define ff first
#define ss second
#define mk make_pair
#define pii pair<int,int>
#define ll long long 
#define all(x) x.begin(),x.end()

const int MAX = 2e5+10 ;
const int LOG = 20 ;
const int inf = 1e8+10 ;

using namespace std ;

struct Seg
{

	ll lz[MAX*4] , mn[MAX*4];
	int idx[MAX*4] ;

	void clean()
	{
		memset(lz, 0, sizeof lz) ;
		memset(mn, 0, sizeof mn) ;
	}

	int m(int l, int r) { return (l+r)>>1 ; }
	void refresh(int pos, int l, int r)
	{
		if(!lz[pos]) return ;

		mn[pos] += lz[pos] ;

		if(l == r) return (void)(lz[pos] = 0 ) ;

		lz[pos<<1] += lz[pos] ;
		lz[pos<<1|1] += lz[pos] ;

		lz[pos] = 0 ;

	}

	void upd(int pos, int l, int r, int beg, int en , int val )
	{
		refresh(pos,l,r) ;

		if(l > en || r < beg ) return ;
		if(l >= beg && r <= en)
		{
			lz[pos] += (ll)val ;
			refresh(pos,l,r) ;
			if(l == r) idx[pos] = l ;
			return ;
		}

		upd(pos<<1 , l, m(l,r) , beg, en, val ) ;
		upd(pos<<1|1 , m(l,r)+1,r, beg, en, val ) ;

		if(mn[pos<<1] <= mn[pos<<1|1])
		{
			idx[pos] = idx[pos<<1] ;
			mn[pos] = mn[pos<<1] ;
		}
		else 
		{
			idx[pos] = idx[pos<<1|1] ;
			mn[pos] = mn[pos<<1|1] ;
		}

	}

	pii qry(int pos, int l, int r, int beg, int en )
	{
		refresh(pos,l,r) ;
		if( l > en || r < beg ) return mk(inf, -1) ;
		if(l >= beg && r <= en) return mk( mn[pos] , idx[pos] ) ;

		pii al = qry(pos<<1 , l, m(l,r) , beg, en ) ;
		pii ar = qry(pos<<1|1 , m(l,r)+1,r, beg, en ) ;

		if( al.ff <= ar.ff ) return al ;
		return ar ;
	}

} seg ;

int n , last , k ;
int dp[2][LOG][MAX] ;
vector<int> h , lef , rig ;
vector<pii> intervalLeft[MAX] , intervalRight[MAX] ;

void extract(int x)
{
	while(true)
	{
	
		pii p = mk(inf, -1) ;
		
		for(auto e : intervalLeft[x] ) 
			p = min(p, seg.qry(1,0,n-1, e.ff, e.ss) ) ;

		if(p.ff == 0) 
		{
			extract(p.ss) ;
			continue ;
		}

		h[x] = last-- ;
		
		seg.upd(1,0,n-1, x , x , inf ) ;
		for(auto e : intervalLeft[x] ) seg.upd(1,0,n-1, e.ff, e.ss, -1) ;

		return ;

	}

}

void init(int K, vector<int> r) 
{
	k = K ;
	n = sz(r) ;
	h.resize(n,0) ;
	last = n ;

	//Find intervals
	intervalLeft[0].push_back( mk(n-k+1,n-1) ) ;
	lp(i,1,n)
	{
		intervalLeft[i].push_back( mk(max(0,i-k+1) , i-1) ) ;

		if( i >= k-1 ) continue ;
		
		int falta = k-1 - i ;
		intervalLeft[i].pb( mk( n-falta , n-1 ) ) ;

	}
	intervalRight[n-1].pb( mk( 0 , k-2 ) ) ;
	lp(i,0,n-1)
	{
		intervalRight[i].pb( mk( i+1, min(n-1, i+k-1) ) ) ;

		if( i+k-1 <= n-1 ) continue ;

		int lef = k-1 - (n-i-1) ;
		intervalRight[i].pb(  mk(0,lef-1)) ;

	}

	for(int i = 0 ; i < n ; i++ ) 
		seg.upd(1,0,n-1, i , i , r[i] ); 

	while(true)
	{
		pii p = seg.qry(1,0,n-1,0,n-1) ;

		if(p.ff != 0) break ;

		extract(p.ss) ;

	}

	if(2*k > n ) return ;

	seg.clean() ;

	vector<int> idx(n) ;
	iota(all(idx) , 0 ) ;
	sort(all(idx), [&](int i, int j){ return h[i] < h[j]; }  ) ;

	memset(dp, -1, sizeof dp ) ;

	for(auto e : idx )
	{
		pii p = mk(0 , -1 ) ;
		for(auto e : intervalLeft[e] )
			p = min(p , seg.qry(1,0,n-1, e.ff, e.ss) ) ;

		dp[0][0][e] = p.ss ;

		p = mk(0, -1 ) ;
		for(auto e : intervalRight[e] ) 
			p = min(p, seg.qry(1,0,n-1, e.ff, e.ss) ) ;

		dp[1][0][e] = p.ss ;

		seg.upd(1,0,n-1,e,e, -h[e] ) ;

	}

	lp(i,0,2)
		lp(j,1,LOG)
			lp(g,0,n)
			{
				if(dp[i][j-1][g] == -1) continue ;
				dp[i][j][g] = dp[i][j-1][ dp[i][j-1][g] ] ;
			}

}

bool isOn(int m, int i) { return ((1<<i)&m) != 0 ; }

int getDist( bool clockwise , int a, int b )
{
	if(!clockwise)
	{
		if(b < a) return a - b ;
		return a + n - b ;
	}

	if( b > a ) return b-a ;
	return n-a+b ;
}

int compare_plants(int x, int y) 
{
	if( 2*k > n || getDist(false, x, y) < k || getDist(true, x, y) < k)
		return h[x] > h[y] ? 1 : -1 ;

	for(int cur : {x,y} )
	for(int type = 0 ; type < 2 ; type++ )
	{
		int filho = dp[type][0][cur] , _filho ;
		int other = (cur == x ) ? y : x ;

		if( filho == -1 ) break ;

		for(int i = LOG-1 ; i >= 0 && filho != other ; i-- )
		{
			_filho = dp[type][i][filho] ;

			if(_filho == -1) continue ;

			int distToCur = getDist(type, _filho, cur ) ;
			int distToOther = getDist(type, _filho, other ) ;

			if( distToOther > distToCur ) continue ;

			filho = _filho ;

		}

		if(h[other] <= h[filho] && (getDist(type, filho, other) < k || getDist(type,filho,other) < k  ) ) 
			return (cur == x) ? 1 : -1 ;

	}

	return 0 ;

}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 34 ms 53496 KB Output is correct
4 Correct 33 ms 53624 KB Output is correct
5 Correct 33 ms 53496 KB Output is correct
6 Correct 108 ms 56440 KB Output is correct
7 Incorrect 186 ms 58284 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 89 ms 13304 KB Output is correct
8 Correct 9 ms 9856 KB Output is correct
9 Correct 11 ms 9856 KB Output is correct
10 Correct 89 ms 13304 KB Output is correct
11 Correct 85 ms 13304 KB Output is correct
12 Correct 84 ms 13468 KB Output is correct
13 Correct 88 ms 13304 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 89 ms 13304 KB Output is correct
8 Correct 9 ms 9856 KB Output is correct
9 Correct 11 ms 9856 KB Output is correct
10 Correct 89 ms 13304 KB Output is correct
11 Correct 85 ms 13304 KB Output is correct
12 Correct 84 ms 13468 KB Output is correct
13 Correct 88 ms 13304 KB Output is correct
14 Correct 152 ms 15484 KB Output is correct
15 Correct 831 ms 37368 KB Output is correct
16 Correct 135 ms 15352 KB Output is correct
17 Correct 815 ms 37368 KB Output is correct
18 Correct 470 ms 37240 KB Output is correct
19 Correct 462 ms 37240 KB Output is correct
20 Correct 740 ms 37496 KB Output is correct

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 53496 KB Output is correct
2 Correct 33 ms 53504 KB Output is correct
3 Incorrect 161 ms 56696 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 34 ms 53496 KB Output is correct
4 Correct 34 ms 53496 KB Output is correct
5 Incorrect 33 ms 53496 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 34 ms 53624 KB Output is correct
4 Correct 33 ms 53492 KB Output is correct
5 Incorrect 36 ms 53624 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 34 ms 53496 KB Output is correct
4 Correct 33 ms 53624 KB Output is correct
5 Correct 33 ms 53496 KB Output is correct
6 Correct 108 ms 56440 KB Output is correct
7 Incorrect 186 ms 58284 KB Output isn't correct
8 Halted 0 ms 0 KB -