oj.uz

Submission #308736

# Submission time Handle Problem Language Result Execution time Memory
308736 2020-10-01T18:53:43 Z CaroLinda Comparing Plants (IOI20_plants) C++14
32 / 100
 960 ms 73848 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 = cur , _filho ;
		int other = (cur == x ) ? y : x ;

		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 ;

			if(distToOther < k )
			{
				if(h[other] <= h[_filho]  ) 
					return (cur == x) ? 1 : -1 ;
			}
			else filho = _filho ;

		}

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

	}

	return 0 ;

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 31 ms 53564 KB Output is correct
4 Correct 32 ms 53504 KB Output is correct
5 Correct 32 ms 53504 KB Output is correct
6 Correct 114 ms 56440 KB Output is correct
7 Correct 230 ms 58232 KB Output is correct
8 Correct 742 ms 73592 KB Output is correct
9 Correct 809 ms 73720 KB Output is correct
10 Correct 851 ms 73720 KB Output is correct
11 Correct 880 ms 73692 KB Output is correct
12 Correct 894 ms 73848 KB Output is correct
13 Correct 874 ms 73592 KB Output is correct
14 Correct 960 ms 73720 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory 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 7 ms 9728 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 88 ms 13304 KB Output is correct
8 Correct 9 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 89 ms 13304 KB Output is correct
11 Correct 88 ms 13176 KB Output is correct
12 Correct 90 ms 13352 KB Output is correct
13 Correct 89 ms 13304 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory 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 7 ms 9728 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 88 ms 13304 KB Output is correct
8 Correct 9 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 89 ms 13304 KB Output is correct
11 Correct 88 ms 13176 KB Output is correct
12 Correct 90 ms 13352 KB Output is correct
13 Correct 89 ms 13304 KB Output is correct
14 Correct 151 ms 15372 KB Output is correct
15 Correct 797 ms 37496 KB Output is correct
16 Correct 132 ms 15480 KB Output is correct
17 Correct 797 ms 37368 KB Output is correct
18 Correct 454 ms 37240 KB Output is correct
19 Correct 479 ms 37292 KB Output is correct
20 Correct 729 ms 37240 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 53496 KB Output is correct
2 Correct 32 ms 53496 KB Output is correct
3 Incorrect 160 ms 56568 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 31 ms 53564 KB Output is correct
4 Correct 32 ms 53496 KB Output is correct
5 Correct 33 ms 53624 KB Output is correct
6 Correct 35 ms 53628 KB Output is correct
7 Correct 60 ms 54208 KB Output is correct
8 Incorrect 51 ms 54264 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 32 ms 53496 KB Output is correct
4 Correct 32 ms 53504 KB Output is correct
5 Incorrect 35 ms 53632 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 31 ms 53564 KB Output is correct
4 Correct 32 ms 53504 KB Output is correct
5 Correct 32 ms 53504 KB Output is correct
6 Correct 114 ms 56440 KB Output is correct
7 Correct 230 ms 58232 KB Output is correct
8 Correct 742 ms 73592 KB Output is correct
9 Correct 809 ms 73720 KB Output is correct
10 Correct 851 ms 73720 KB Output is correct
11 Correct 880 ms 73692 KB Output is correct
12 Correct 894 ms 73848 KB Output is correct
13 Correct 874 ms 73592 KB Output is correct
14 Correct 960 ms 73720 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 88 ms 13304 KB Output is correct
22 Correct 9 ms 9856 KB Output is correct
23 Correct 10 ms 9856 KB Output is correct
24 Correct 89 ms 13304 KB Output is correct
25 Correct 88 ms 13176 KB Output is correct
26 Correct 90 ms 13352 KB Output is correct
27 Correct 89 ms 13304 KB Output is correct
28 Correct 151 ms 15372 KB Output is correct
29 Correct 797 ms 37496 KB Output is correct
30 Correct 132 ms 15480 KB Output is correct
31 Correct 797 ms 37368 KB Output is correct
32 Correct 454 ms 37240 KB Output is correct
33 Correct 479 ms 37292 KB Output is correct
34 Correct 729 ms 37240 KB Output is correct
35 Correct 34 ms 53496 KB Output is correct
36 Correct 32 ms 53496 KB Output is correct
37 Incorrect 160 ms 56568 KB Output isn't correct
38 Halted 0 ms 0 KB -