oj.uz

Submission #308725

# Submission time Handle Problem Language Result Execution time Memory
308725 2020-10-01T18:16:12 Z CaroLinda Comparing Plants (IOI20_plants) C++14
32 / 100
 910 ms 73824 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 ) continue ;

		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
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 32 ms 53504 KB Output is correct
4 Correct 33 ms 53504 KB Output is correct
5 Correct 34 ms 53496 KB Output is correct
6 Correct 108 ms 56440 KB Output is correct
7 Correct 211 ms 58232 KB Output is correct
8 Correct 697 ms 73720 KB Output is correct
9 Correct 757 ms 73592 KB Output is correct
10 Correct 782 ms 73720 KB Output is correct
11 Correct 801 ms 73624 KB Output is correct
12 Correct 798 ms 73616 KB Output is correct
13 Correct 814 ms 73824 KB Output is correct
14 Correct 910 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 11 ms 9856 KB Output is correct
7 Correct 86 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 86 ms 13304 KB Output is correct
11 Correct 81 ms 13176 KB Output is correct
12 Correct 83 ms 13432 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 11 ms 9856 KB Output is correct
7 Correct 86 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 86 ms 13304 KB Output is correct
11 Correct 81 ms 13176 KB Output is correct
12 Correct 83 ms 13432 KB Output is correct
13 Correct 89 ms 13304 KB Output is correct
14 Correct 129 ms 15356 KB Output is correct
15 Correct 829 ms 37320 KB Output is correct
16 Correct 130 ms 15352 KB Output is correct
17 Correct 798 ms 37368 KB Output is correct
18 Correct 454 ms 37240 KB Output is correct
19 Correct 460 ms 37240 KB Output is correct
20 Correct 735 ms 37368 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 53504 KB Output is correct
2 Correct 34 ms 53496 KB Output is correct
3 Incorrect 163 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 33 ms 53496 KB Output is correct
4 Correct 33 ms 53504 KB Output is correct
5 Correct 39 ms 53496 KB Output is correct
6 Correct 36 ms 53620 KB Output is correct
7 Correct 57 ms 54136 KB Output is correct
8 Incorrect 54 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 33 ms 53496 KB Output is correct
4 Correct 33 ms 53496 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

# 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 32 ms 53504 KB Output is correct
4 Correct 33 ms 53504 KB Output is correct
5 Correct 34 ms 53496 KB Output is correct
6 Correct 108 ms 56440 KB Output is correct
7 Correct 211 ms 58232 KB Output is correct
8 Correct 697 ms 73720 KB Output is correct
9 Correct 757 ms 73592 KB Output is correct
10 Correct 782 ms 73720 KB Output is correct
11 Correct 801 ms 73624 KB Output is correct
12 Correct 798 ms 73616 KB Output is correct
13 Correct 814 ms 73824 KB Output is correct
14 Correct 910 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 11 ms 9856 KB Output is correct
21 Correct 86 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 86 ms 13304 KB Output is correct
25 Correct 81 ms 13176 KB Output is correct
26 Correct 83 ms 13432 KB Output is correct
27 Correct 89 ms 13304 KB Output is correct
28 Correct 129 ms 15356 KB Output is correct
29 Correct 829 ms 37320 KB Output is correct
30 Correct 130 ms 15352 KB Output is correct
31 Correct 798 ms 37368 KB Output is correct
32 Correct 454 ms 37240 KB Output is correct
33 Correct 460 ms 37240 KB Output is correct
34 Correct 735 ms 37368 KB Output is correct
35 Correct 33 ms 53504 KB Output is correct
36 Correct 34 ms 53496 KB Output is correct
37 Incorrect 163 ms 56568 KB Output isn't correct
38 Halted 0 ms 0 KB -