oj.uz

Submission #318038

# Submission time Handle Problem Language Result Execution time Memory
318038 2020-10-31T09:56:01 Z arnold518 Comparing Plants (IOI20_plants) C++14
49 / 100
 2089 ms 38612 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;
const int INF = 1e8;

int N, K, R[MAXN+10], H[MAXN+10];

struct SEG
{
	pii tree[MAXN*4+10];
	int lazy[MAXN*4+10];

	void busy(int node, int tl, int tr)
	{
		tree[node].first+=lazy[node];
		if(tl!=tr)
		{
			lazy[node*2]+=lazy[node];
			lazy[node*2+1]+=lazy[node];
		}
		lazy[node]=0;
	}
	void init(int node, int tl, int tr)
	{
		if(tl==tr)
		{
			tree[node]={0, tl};
			lazy[node]=0;
			return;
		}
		int mid=tl+tr>>1;
		init(node*2, tl, mid);
		init(node*2+1, mid+1, tr);
		tree[node]=min(tree[node*2], tree[node*2+1]);
	}
	void update(int node, int tl, int tr, int l, int r, int k)
	{
		busy(node, tl, tr);
		if(l<=tl && tr<=r)
		{
			lazy[node]+=k;
			busy(node, tl, tr);
			return;
		}
		if(r<tl || tr<l) return;
		int mid=tl+tr>>1;
		update(node*2, tl, mid, l, r, k);
		update(node*2+1, mid+1, tr, l, r, k);
		tree[node]=min(tree[node*2], tree[node*2+1]);
	}
	void update2(int node, int tl, int tr, int p, int k)
	{
		busy(node, tl, tr);
		if(tl==tr)
		{
			tree[node].first=k;
			return;
		}
		int mid=tl+tr>>1;
		if(p<=mid) update2(node*2, tl, mid, p, k);
		else update2(node*2+1, mid+1, tr, p, k);
		tree[node]=min(tree[node*2], tree[node*2+1]);
	}
	pii query(int node, int tl, int tr, int l, int r)
	{
		busy(node, tl, tr);
		if(l<=tl && tr<=r) return tree[node];
		if(r<tl || tr<l) return {INF, -1};
		int mid=tl+tr>>1;
		return min(query(node*2, tl, mid, l, r), query(node*2+1, mid+1, tr, l, r));
	}
	void query2(int node, int tl, int tr, int l, int r, vector<int> &V)
	{
		busy(node, tl, tr);
		if(tree[node].first!=0) return;
		if(r<tl || tr<l) return;
		if(tl==tr)
		{
			V.push_back(tl);
			return;
		}
		int mid=tl+tr>>1;
		query2(node*2, tl, mid, l, r, V);
		query2(node*2+1, mid+1, tr, l, r, V);
	}
	void init()
	{
		init(1, 0, N-1);
	}
	void update(int l, int r, int k)
	{
		l=(l%N+N)%N; r=(r%N+N)%N;
		if(l<=r) update(1, 0, N-1, l, r, k);
		else
		{
			update(1, 0, N-1, l, N-1, k);
			update(1, 0, N-1, 0, r, k);
		}
	}
	void update2(int p, int k)
	{
		p=(p%N+N)%N;
		update2(1, 0, N-1, p, k);
	}
	pii query(int l, int r)
	{
		l=(l%N+N)%N; r=(r%N+N)%N;
		if(l<=r) return query(1, 0, N-1, l, r);
		else return min(query(1, 0, N-1, l, N-1), query(1, 0, N-1, 0, r));
	}
	vector<int> query2(int l, int r)
	{
		vector<int> ret;
		l=(l%N+N)%N; r=(r%N+N)%N;
		if(l<=r) query2(1, 0, N-1, l, r, ret);
		else
		{
			query2(1, 0, N-1, l, N-1, ret);
			query2(1, 0, N-1, 0, r, ret);
		}
		return ret;
	}
}seg1, seg2, seg3;

int LL[MAXN*3+10], RR[MAXN*3+10];

void init(int _K, vector<int> _R)
{
	K=_K; N=_R.size();
	for(int i=0; i<N; i++) R[i]=_R[i];
	seg1.init(); seg2.init(); seg3.init();

	for(int i=0; i<N; i++)
	{
		seg1.update2(i, R[i]);
		seg2.update2(i, R[i]);
	}
	for(int i=0; i<N; i++) if(R[i]==0) seg1.update(i+1, i+K-1, 1);

	for(int i=N-1; i>=0; i--)
	{
		vector<int> V;
		assert(seg1.tree[1].first+seg1.lazy[1]==0);
		int now=seg1.tree[1].second; H[now]=i;
		assert(seg2.query(now-K+1, now-1).first>=1);
		seg1.update(now+1, now+K-1, -1);
		seg1.update2(now, INF);
		seg2.update2(now, INF);
		seg2.update(now-K+1, now-1, -1);
		seg1.update(now-K+1, now-1, -1);

		V=seg2.query2(now-K+1, now-1);
		for(auto it : V) seg1.update(it+1, it+K-1, 1);
	}
	//for(int i=0; i<N; i++) printf("%d ", H[i]); printf("\n");
	
	vector<pii> V;
	for(int i=0; i<N; i++) V.push_back({H[i], i});
	sort(V.begin(), V.end(), greater<pii>());
	
	for(int i=0; i<N; i++) seg3.update2(i, INF);

	for(int i=N; i<N+N; i++) LL[i]=RR[i]=i;
	for(int i=0; i<V.size(); i++)
	{
		int now=V[i].second;
		pii t1=seg3.query(now-K+1, now), t2=seg3.query(now, now+K-1);

		if(t1.first!=INF)
		{
			int p=t1.second;
			if(p<now) p+=N;

			LL[now+N]=min(LL[now+N], LL[p]);
			RR[now+N]=max(RR[now+N], RR[p]);
		}
		if(t2.first!=INF)
		{
			int p=t2.second;
			if(p>now) p+=N;
			else p+=N+N;

			LL[now+N]=min(LL[now+N], LL[p]);
			RR[now+N]=max(RR[now+N], RR[p]);
		}

		//LL[now+N]=max(LL[now+N], now);
		//RR[now+N]=min(RR[now+N], now+N+N);

		LL[now]=LL[now+N]-N;
		RR[now]=RR[now+N]-N;
		LL[now+N+N]=LL[now+N]+N;
		RR[now+N+N]=RR[now+N]+N;
		seg3.update2(now, H[now]);
	}
 
	return;
}

bool f(int l, int r, int x)
{
	while(x<l) x+=N;
	return l<=x && x<=r;
}
 
int compare_plants(int x, int y)
{
	int ans=0;
	if(H[x]<H[y] && f(LL[x+N], RR[x+N], y)) return -1;
	if(H[y]<H[x] && f(LL[y+N], RR[y+N], x)) return 1;
	return 0;
}

Compilation message

plants.cpp: In member function 'void SEG::init(int, int, int)':
plants.cpp:37:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |   int mid=tl+tr>>1;
      |           ~~^~~
plants.cpp: In member function 'void SEG::update(int, int, int, int, int, int)':
plants.cpp:52:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   52 |   int mid=tl+tr>>1;
      |           ~~^~~
plants.cpp: In member function 'void SEG::update2(int, int, int, int, int)':
plants.cpp:65:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |   int mid=tl+tr>>1;
      |           ~~^~~
plants.cpp: In member function 'pii SEG::query(int, int, int, int, int)':
plants.cpp:75:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   75 |   int mid=tl+tr>>1;
      |           ~~^~~
plants.cpp: In member function 'void SEG::query2(int, int, int, int, int, std::vector<int>&)':
plants.cpp:88:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   88 |   int mid=tl+tr>>1;
      |           ~~^~~
plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:170:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |  for(int i=0; i<V.size(); i++)
      |               ~^~~~~~~~~
plants.cpp: In function 'int compare_plants(int, int)':
plants.cpp:214:6: warning: unused variable 'ans' [-Wunused-variable]
  214 |  int ans=0;
      |      ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19180 KB Output is correct
2 Correct 10 ms 19308 KB Output is correct
3 Correct 12 ms 19308 KB Output is correct
4 Correct 12 ms 19180 KB Output is correct
5 Correct 11 ms 19180 KB Output is correct
6 Correct 74 ms 22116 KB Output is correct
7 Correct 148 ms 23616 KB Output is correct
8 Correct 886 ms 38608 KB Output is correct
9 Correct 884 ms 38484 KB Output is correct
10 Correct 896 ms 38612 KB Output is correct
11 Correct 876 ms 38612 KB Output is correct
12 Correct 882 ms 38612 KB Output is correct
13 Correct 862 ms 38608 KB Output is correct
14 Correct 869 ms 38484 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19180 KB Output is correct
2 Correct 10 ms 19180 KB Output is correct
3 Correct 11 ms 19180 KB Output is correct
4 Correct 10 ms 19084 KB Output is correct
5 Correct 11 ms 19180 KB Output is correct
6 Correct 17 ms 19308 KB Output is correct
7 Correct 101 ms 22496 KB Output is correct
8 Correct 12 ms 19180 KB Output is correct
9 Correct 16 ms 19308 KB Output is correct
10 Correct 105 ms 22624 KB Output is correct
11 Correct 93 ms 22368 KB Output is correct
12 Correct 95 ms 22624 KB Output is correct
13 Correct 100 ms 22612 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19180 KB Output is correct
2 Correct 10 ms 19180 KB Output is correct
3 Correct 11 ms 19180 KB Output is correct
4 Correct 10 ms 19084 KB Output is correct
5 Correct 11 ms 19180 KB Output is correct
6 Correct 17 ms 19308 KB Output is correct
7 Correct 101 ms 22496 KB Output is correct
8 Correct 12 ms 19180 KB Output is correct
9 Correct 16 ms 19308 KB Output is correct
10 Correct 105 ms 22624 KB Output is correct
11 Correct 93 ms 22368 KB Output is correct
12 Correct 95 ms 22624 KB Output is correct
13 Correct 100 ms 22612 KB Output is correct
14 Correct 212 ms 23884 KB Output is correct
15 Correct 2089 ms 38612 KB Output is correct
16 Correct 208 ms 25024 KB Output is correct
17 Correct 2055 ms 38592 KB Output is correct
18 Correct 1341 ms 38612 KB Output is correct
19 Correct 1323 ms 38504 KB Output is correct
20 Correct 1869 ms 38612 KB Output is correct

Subtask #4
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 19180 KB Output is correct
2 Correct 10 ms 19328 KB Output is correct
3 Correct 81 ms 22116 KB Output is correct
4 Correct 989 ms 37424 KB Output is correct
5 Correct 1228 ms 38600 KB Output is correct
6 Correct 1650 ms 38612 KB Output is correct
7 Correct 1914 ms 38612 KB Output is correct
8 Correct 2050 ms 38568 KB Output is correct
9 Correct 1089 ms 38612 KB Output is correct
10 Correct 1084 ms 38484 KB Output is correct
11 Correct 888 ms 38480 KB Output is correct
12 Correct 1062 ms 38500 KB Output is correct
13 Correct 1329 ms 38612 KB Output is correct

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19180 KB Output is correct
2 Correct 11 ms 19180 KB Output is correct
3 Correct 11 ms 19180 KB Output is correct
4 Correct 11 ms 19180 KB Output is correct
5 Incorrect 11 ms 19180 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19180 KB Output is correct
2 Correct 11 ms 19200 KB Output is correct
3 Correct 10 ms 19180 KB Output is correct
4 Correct 11 ms 19180 KB Output is correct
5 Incorrect 16 ms 19180 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19180 KB Output is correct
2 Correct 10 ms 19308 KB Output is correct
3 Correct 12 ms 19308 KB Output is correct
4 Correct 12 ms 19180 KB Output is correct
5 Correct 11 ms 19180 KB Output is correct
6 Correct 74 ms 22116 KB Output is correct
7 Correct 148 ms 23616 KB Output is correct
8 Correct 886 ms 38608 KB Output is correct
9 Correct 884 ms 38484 KB Output is correct
10 Correct 896 ms 38612 KB Output is correct
11 Correct 876 ms 38612 KB Output is correct
12 Correct 882 ms 38612 KB Output is correct
13 Correct 862 ms 38608 KB Output is correct
14 Correct 869 ms 38484 KB Output is correct
15 Correct 10 ms 19180 KB Output is correct
16 Correct 10 ms 19180 KB Output is correct
17 Correct 11 ms 19180 KB Output is correct
18 Correct 10 ms 19084 KB Output is correct
19 Correct 11 ms 19180 KB Output is correct
20 Correct 17 ms 19308 KB Output is correct
21 Correct 101 ms 22496 KB Output is correct
22 Correct 12 ms 19180 KB Output is correct
23 Correct 16 ms 19308 KB Output is correct
24 Correct 105 ms 22624 KB Output is correct
25 Correct 93 ms 22368 KB Output is correct
26 Correct 95 ms 22624 KB Output is correct
27 Correct 100 ms 22612 KB Output is correct
28 Correct 212 ms 23884 KB Output is correct
29 Correct 2089 ms 38612 KB Output is correct
30 Correct 208 ms 25024 KB Output is correct
31 Correct 2055 ms 38592 KB Output is correct
32 Correct 1341 ms 38612 KB Output is correct
33 Correct 1323 ms 38504 KB Output is correct
34 Correct 1869 ms 38612 KB Output is correct
35 Correct 12 ms 19180 KB Output is correct
36 Correct 10 ms 19328 KB Output is correct
37 Correct 81 ms 22116 KB Output is correct
38 Correct 989 ms 37424 KB Output is correct
39 Correct 1228 ms 38600 KB Output is correct
40 Correct 1650 ms 38612 KB Output is correct
41 Correct 1914 ms 38612 KB Output is correct
42 Correct 2050 ms 38568 KB Output is correct
43 Correct 1089 ms 38612 KB Output is correct
44 Correct 1084 ms 38484 KB Output is correct
45 Correct 888 ms 38480 KB Output is correct
46 Correct 1062 ms 38500 KB Output is correct
47 Correct 1329 ms 38612 KB Output is correct
48 Correct 10 ms 19180 KB Output is correct
49 Correct 11 ms 19180 KB Output is correct
50 Correct 11 ms 19180 KB Output is correct
51 Correct 11 ms 19180 KB Output is correct
52 Incorrect 11 ms 19180 KB Output isn't correct
53 Halted 0 ms 0 KB -