oj.uz

Submission #385485

# Submission time Handle Problem Language Result Execution time Memory
385485 2021-04-04T13:29:22 Z ogibogi2004 Robots (APIO13_robots) C++14
60 / 100
 1500 ms 146644 KB 
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("O3")
#pragma GCC target ("fma,avx,avx2")
#define ends dfdsfdsf
const int INF=1e8;
pair<pair<int,int>,int> nxt[512][512][4];
vector<pair<pair<int,int>,int> >g[512][512][4];
vector<pair<int,int> >g1[512][512];
char table[512][512];
int r,n,m;
vector<pair<pair<int,int>,int> >ends;
pair<pair<int,int>,int> actual_nxt[512][512][4];
bool not_valid(pair<int,int> p)
{
	int x=p.first,y=p.second;
	if(x<1||y<1||x>n||y>m)return 1;
	return table[x][y]=='x';
}
int dp[45][512][512];
pair<int,int> where[10];
int number[10][10];
int c(int x,int y)
{
	return number[x][y];
}
void pre()
{
	int cnt=0;
	for(int i=1;i<=9;i++)
	{
		for(int j=i;j<=9;j++)
		{
			number[i][j]=cnt++;
		}
	}
}
int main()
{
	pre();
	cin>>r>>m>>n;
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=m;++j)
		{
			cin>>table[i][j];
			if(isdigit(table[i][j]))
			{
				where[table[i][j]-'0']={i,j};
			}
		}
	}
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=m;++j)
		{
			if(table[i][j]=='x')continue;
			if(table[i][j]=='A')
			{
				nxt[i][j][0]={{i,j-1},3};
				nxt[i][j][1]={{i-1,j},0};
				nxt[i][j][2]={{i,j+1},1};
				nxt[i][j][3]={{i+1,j},2};
			}
			else if(table[i][j]=='C')
			{
				nxt[i][j][0]={{i,j+1},1};
				nxt[i][j][1]={{i+1,j},2};
				nxt[i][j][2]={{i,j-1},3};
				nxt[i][j][3]={{i-1,j},0};
			}
			else
			{
				nxt[i][j][0]={{i-1,j},0};
				nxt[i][j][1]={{i,j+1},1};
				nxt[i][j][2]={{i+1,j},2};
				nxt[i][j][3]={{i,j-1},3};
			}
			for(int l=0;l<4;++l)
			{
				if(not_valid(nxt[i][j][l].first))
				{
					ends.push_back({{i,j},l});
				}
				g[nxt[i][j][l].first.first][nxt[i][j][l].first.second][nxt[i][j][l].second].push_back({{i,j},l});
			}
		}
	}
	queue<pair<pair<int,int>,int> >qq;
	for(auto xd:ends)
	{
		qq.push(xd);
		actual_nxt[xd.first.first][xd.first.second][xd.second]=xd;
	}
	while(!qq.empty())
	{
		auto u=qq.front();
		qq.pop();
		for(auto xd:g[u.first.first][u.first.second][u.second])
		{
			actual_nxt[xd.first.first][xd.first.second][xd.second]=actual_nxt[u.first.first][u.first.second][u.second];
			qq.push(xd);
		}
	}
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=m;++j)
		{
			for(int l=0;l<4;++l)
			{
				int x,y,z;
				x=actual_nxt[i][j][l].first.first;
				y=actual_nxt[i][j][l].first.second;
				z=actual_nxt[i][j][l].second;
				if(x==i&&y==j&&z==l)continue;
				g1[i][j].push_back({x,y});
			}
		}
	}
	for(int r1=1;r1<=r;++r1)
	{
		for(int r2=1;r2<=r;++r2)
		{
			for(int i1=1;i1<=n;++i1)
			{
				for(int i2=1;i2<=m;++i2)
				{
					dp[c(r1,r2)][i1][i2]=INF;
				}
			}
		}
	}
	queue<pair<int,int> >q;
	for(int i=1;i<=r;++i)
	{
		int x,y;
		x=where[i].first;
		y=where[i].second;
		q.push({x,y});
		dp[c(i,i)][x][y]=0;
		while(!q.empty())
		{
			tie(x,y)=q.front();
			q.pop();
			for(auto xd:g1[x][y])
			{
				if(dp[c(i,i)][xd.first][xd.second]>dp[c(i,i)][x][y]+1)
				{
					dp[c(i,i)][xd.first][xd.second]=dp[c(i,i)][x][y]+1;
					q.push(xd);
				}
			}
		}
	}
	priority_queue<pair<int,pair<int,int> > >pq;
	for(int len=2;len<=r;++len)
	{
		for(int r1=1;r1+len-1<=r;++r1)
		{
			int r2=r1+len-1;
			for(int mid=r1;mid<r2;++mid)
			{
				for(int i=1;i<=n;++i)
				{
					for(int j=1;j<=m;++j)
					{
						dp[c(r1,r2)][i][j]=min(dp[c(r1,r2)][i][j],dp[c(r1,mid)][i][j]+dp[c(mid+1,r2)][i][j]);
					}
				}
			}
			for(int i=1;i<=n;++i)
			{
				for(int j=1;j<=m;++j)
				{
					pq.push({-dp[c(r1,r2)][i][j],{i,j}});
				}
			}
			while(!pq.empty())
			{
				int x,y;
				int t;
				t=pq.top().first;
				tie(x,y)=pq.top().second;
				pq.pop();
				if(t!=-dp[c(r1,r2)][x][y])continue;
				for(auto xd:g1[x][y])
				{
					if(dp[c(r1,r2)][x][y]+1<dp[c(r1,r2)][xd.first][xd.second])
					{
						dp[c(r1,r2)][xd.first][xd.second]=dp[c(r1,r2)][x][y]+1;
						pq.push({-dp[c(r1,r2)][xd.first][xd.second],{xd}});
					}
				}
			}
		}
	}
	/*for(int i1=1;i1<=r;i1++)
	{
		for(int i2=i1;i2<=r;i2++)
		{
			cout<<i1<<"-"<<i2<<endl;
			for(int i=1;i<=n;i++)
			{
				for(int j=1;j<=m;j++)
				{
					if(dp[i1][i2][i][j]<INF)cout<<dp[i1][i2][i][j];
					else cout<<"x";
				}
				cout<<endl;
			}
		}
	}*/
	int ans=INF;
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=m;++j)
		{
			ans=min(ans,dp[c(1,r)][i][j]);
		}
	}
	if(ans==INF)cout<<"-1\n";
	else cout<<ans<<endl;
return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 31084 KB Output is correct
2 Correct 22 ms 31084 KB Output is correct
3 Correct 22 ms 31084 KB Output is correct
4 Correct 22 ms 31340 KB Output is correct
5 Correct 23 ms 31360 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 31084 KB Output is correct
2 Correct 22 ms 31084 KB Output is correct
3 Correct 22 ms 31084 KB Output is correct
4 Correct 22 ms 31340 KB Output is correct
5 Correct 23 ms 31360 KB Output is correct
6 Correct 22 ms 31212 KB Output is correct
7 Correct 22 ms 31084 KB Output is correct
8 Correct 22 ms 31232 KB Output is correct
9 Correct 22 ms 31212 KB Output is correct
10 Correct 24 ms 31340 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 31084 KB Output is correct
2 Correct 22 ms 31084 KB Output is correct
3 Correct 22 ms 31084 KB Output is correct
4 Correct 22 ms 31340 KB Output is correct
5 Correct 23 ms 31360 KB Output is correct
6 Correct 22 ms 31212 KB Output is correct
7 Correct 22 ms 31084 KB Output is correct
8 Correct 22 ms 31232 KB Output is correct
9 Correct 22 ms 31212 KB Output is correct
10 Correct 24 ms 31340 KB Output is correct
11 Correct 742 ms 79136 KB Output is correct
12 Correct 68 ms 50464 KB Output is correct
13 Correct 424 ms 72736 KB Output is correct
14 Correct 1052 ms 79136 KB Output is correct
15 Correct 768 ms 79136 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 31084 KB Output is correct
2 Correct 22 ms 31084 KB Output is correct
3 Correct 22 ms 31084 KB Output is correct
4 Correct 22 ms 31340 KB Output is correct
5 Correct 23 ms 31360 KB Output is correct
6 Correct 22 ms 31212 KB Output is correct
7 Correct 22 ms 31084 KB Output is correct
8 Correct 22 ms 31232 KB Output is correct
9 Correct 22 ms 31212 KB Output is correct
10 Correct 24 ms 31340 KB Output is correct
11 Correct 742 ms 79136 KB Output is correct
12 Correct 68 ms 50464 KB Output is correct
13 Correct 424 ms 72736 KB Output is correct
14 Correct 1052 ms 79136 KB Output is correct
15 Correct 768 ms 79136 KB Output is correct
16 Execution timed out 1591 ms 146644 KB Time limit exceeded
17 Halted 0 ms 0 KB -