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Submission #151993

# Submission time Handle Problem Language Result Execution time Memory
151993 2019-09-05T20:02:33 Z TadijaSebez Robots (APIO13_robots) C++11
30 / 100
 9 ms 1016 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=505;
const int H=N*N;
const int inf=1e9+7;
int n,m,k,nm;
int ID(int x, int y){ return (x-1)*m+y;}
int go[N][N][4],Move[4][2]={{0,1},{-1,0},{0,-1},{1,0}};
char base[N][N];
int Get(int x, int y, int d)
{
	if(base[x][y]=='x' || x==0 || y==0 || x>n || y>m) return ID(x-Move[d][0],y-Move[d][1]);
	if(go[x][y][d]) return go[x][y][d];
	go[x][y][d]=-1;
	if(base[x][y]=='A') go[x][y][d]=Get(x+Move[(d+1)%4][0],y+Move[(d+1)%4][1],(d+1)%4);
	else if(base[x][y]=='C') go[x][y][d]=Get(x+Move[(d+3)%4][0],y+Move[(d+3)%4][1],(d+3)%4);
	else go[x][y][d]=Get(x+Move[d][0],y+Move[d][1],d);
	return go[x][y][d];
}
vector<int> E[N];
int dist[10][10][H];
void BFS(int st, int id)
{
	queue<int> q;
	for(int i=1;i<=nm;i++) dist[id][id][i]=-1;
	dist[id][id][st]=0;
	q.push(st);
	while(q.size())
	{
		int x=q.front();
		q.pop();
		for(int y:E[x]) if(dist[id][id][y]==-1)
		{
			dist[id][id][y]=dist[id][id][x]+1;
			q.push(y);
		}
	}
}
int tmp_d[H];
void Dijkstra()
{
	priority_queue<pair<int,int>> pq;
	for(int i=1;i<=nm;i++) pq.push({-tmp_d[i],i});
	while(pq.size())
	{
		int x=pq.top().second;
		int d=-pq.top().first;
		pq.pop();
		if(d!=tmp_d[x]) continue;
		for(int y:E[x]) if(tmp_d[y]>tmp_d[x]+1)
		{
			tmp_d[y]=tmp_d[x]+1;
			pq.push({-tmp_d[y],y});
		}
	}
}
int main()
{
	scanf("%i %i %i",&k,&m,&n);nm=n*m;
	for(int i=1;i<=n;i++) scanf("%s",base[i]+1);
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++)
	{
		for(int d=0;d<4;d++)
		{
			if(Get(i,j,d)!=-1) E[ID(i,j)].pb(go[i][j][d]);
		}
	}
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) if(base[i][j]>='1' && base[i][j]<='9')
	{
		int id=base[i][j]-'0';
		BFS(ID(i,j),id);
	}
	for(int len=2;len<=k;len++) for(int i=1;i<=k-len+1;i++)
	{
		int j=i+len-1;
		for(int u=1;u<=nm;u++) dist[i][j][u]=-1;
		for(int z=i;z<j;z++)
		{
            for(int u=1;u<=nm;u++) if(dist[i][z][u]!=-1 && dist[z+1][j][u]!=-1)
			{
				int sum=dist[i][z][u]+dist[z+1][j][u];
				if(dist[i][j][u]==-1 || sum<dist[i][j][u]) dist[i][j][u]=sum;
			}
		}
		for(int u=1;u<=nm;u++) tmp_d[u]=dist[i][j][u]==-1?inf:dist[i][j][u];
		Dijkstra();
		for(int u=1;u<=nm;u++) dist[i][j][u]=tmp_d[u]==inf?-1:tmp_d[u];
	}
	int ans=-1;
	for(int u=1;u<=nm;u++) if(dist[1][k][u]!=-1)
	{
		if(ans==-1 || ans>dist[1][k][u]) ans=dist[1][k][u];
	}
	printf("%i\n",ans);
	return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:60:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i",&k,&m,&n);nm=n*m;
  ~~~~~^~~~~~~~~~~~~~~~~~~~~
robots.cpp:61:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%s",base[i]+1);
                        ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 504 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 504 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Runtime error 9 ms 1016 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Runtime error 9 ms 1016 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -