oj.uz

Submission #317722

# Submission time Handle Problem Language Result Execution time Memory
317722 2020-10-30T08:03:41 Z arnold518 Comparing Plants (IOI20_plants) C++14
11 / 100
 4000 ms 101624 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 = 5000;
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 adj[MAXN+10][MAXN+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=0; i<N; i++) for(int j=0; j<N; j++) adj[i][j]=INF;
	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;
			adj[now][p]=0;
		}
		if(t2.first!=INF)
		{
			int p=t2.second;
			adj[now][p]=0;
		}

		seg3.update2(now, H[now]);
	}
 
	for(int k=0; k<N; k++) for(int i=0; i<N; i++) for(int j=0; j<N; j++) adj[i][j]=min(adj[i][j], adj[i][k]+adj[k][j]);
	return;
}
 
int compare_plants(int x, int y)
{
	int ans=0;
	if(adj[x][y]==0) return -1;
	if(adj[y][x]==0) 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:195:6: warning: unused variable 'ans' [-Wunused-variable]
  195 |  int ans=0;
      |      ^~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 70 ms 3704 KB Output is correct
7 Runtime error 68 ms 6520 KB Execution killed with signal 11 (could be triggered by violating memory limits)
8 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 3 ms 1280 KB Output is correct
6 Correct 1250 ms 8908 KB Output is correct
7 Execution timed out 4029 ms 101624 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 3 ms 1280 KB Output is correct
6 Correct 1250 ms 8908 KB Output is correct
7 Execution timed out 4029 ms 101624 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Execution timed out 4018 ms 27000 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 5 ms 1408 KB Output is correct
7 Correct 52 ms 3320 KB Output is correct
8 Correct 53 ms 3320 KB Output is correct
9 Correct 49 ms 3320 KB Output is correct
10 Correct 49 ms 3320 KB Output is correct
11 Correct 48 ms 3320 KB Output is correct
12 Correct 48 ms 3328 KB Output is correct
13 Correct 49 ms 3320 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1213 ms 8952 KB Output is correct
6 Runtime error 87 ms 11640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
7 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 70 ms 3704 KB Output is correct
7 Runtime error 68 ms 6520 KB Execution killed with signal 11 (could be triggered by violating memory limits)
8 Halted 0 ms 0 KB -