oj.uz

Submission #129800

# Submission time Handle Problem Language Result Execution time Memory
129800 2019-07-13T09:03:19 Z davitmarg Portals (BOI14_portals) C++17
70 / 100
 333 ms 196552 KB 
/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <stack>
#include <cassert>
#include <iterator>
#include <bitset>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(),v.end()
using namespace std;

int n,m,k,st,en;
vector<bool> used;
pair<int,int> u[1003][1003],d[1003][1003],l[1003][1003],r[1003][1003];
vector<pair<int,int>> g[1000006];
vector<int> dist,mot;
char a[1003][1003];

int id(int y,int x)
{
	return y*m+x;
}

void print(int ind)
{
	int y,x;
    x=ind%m;
    if(!x)
		x=m;
    y=(ind-x)/m;
    cout<<"! "<<y<<" "<<x<<" d="<<dist[ind]<<endl;
}

void addNode(int a,int b,int d)
{
	g[a].PB(MP(b,d));
}

int main()
{
    cin >> n >> m;
    k=n*m+m;
    dist.resize(k+5);
    mot.resize(k+5);
    used.resize(k+5);
    for(int i=1;i<=n;i++)
	{
		int x=getchar();
		for(int j=1;j<=m;j++)
		{
            x=getchar();
            a[i][j]=(char)x;
            if(a[i][j]=='S')
			{
				st=id(i,j);
                a[i][j]='.';
			}
			else if(a[i][j]=='C')
			{
				en=id(i,j);
                a[i][j]='.';
			}
		}
	}
    for(int i=1;i<=n;i++)
        a[i][0]=a[i][m+1]='#';
    for(int i=1;i<=m;i++)
        a[0][i]=a[n+1][i]='#';


    for(int i=0;i<=n;i++)
		for(int j=0;j<=m;j++)
		{
            if(a[i][j]=='#')
                u[i][j]=l[i][j]=MP(i,j);
			else
			{
				u[i][j]=u[i-1][j];
				l[i][j]=l[i][j-1];
			}
		}

    for(int i=n+1;i>=1;i--)
		for(int j=m+1;j>=1;j--)
		{
            if(a[i][j]=='#')
                d[i][j]=r[i][j]=MP(i,j);
			else
			{
				d[i][j]=d[i+1][j];
				r[i][j]=r[i][j+1];
			}
		}
    queue<int> Q;

    for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
            if(a[i][j]!='#' && a[i-1][j]=='#' || a[i+1][j]=='#' || a[i][j-1]=='#'|| a[i][j+1]=='#')
			{
				int start=id(i,j);
				Q.push(start);
				used[start]=1;
			}

    for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
		{
			if(a[i][j]=='#')
                continue;
            if(a[i-1][j]!='#')
                addNode(id(i,j),id(i-1,j),1);
            if(a[i+1][j]!='#')
                addNode(id(i,j),id(i+1,j),1);
            if(a[i][j-1]!='#')
                addNode(id(i,j),id(i,j-1),1);
            if(a[i][j+1]!='#')
                addNode(id(i,j),id(i,j+1),1);
		}

    while(!Q.empty())
	{
		int v=Q.front();
        Q.pop();
        //print(v);
        for(int i=0;i<g[v].size();i++)
		{
			int to=g[v][i].first;
            if(used[to])
				continue;
			used[to]=1;
            mot[to]=mot[v]+1;
            Q.push(to);
		}
	}

    for(int i=1;i<=k;i++)
	{
		used[i]=0;
        dist[i]=mod;
	}

    for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
		{
			if(a[i][j]=='#')
                continue;

            if(1)
			{
				int y,x;
                y=u[i][j].first;
                x=u[i][j].second;
				addNode(id(i,j),id(y+1,x),mot[id(i,j)]+1);

                y=d[i][j].first;
                x=d[i][j].second;
				addNode(id(i,j),id(y-1,x),mot[id(i,j)]+1);

                y=l[i][j].first;
                x=l[i][j].second;
				addNode(id(i,j),id(y,x+1),mot[id(i,j)]+1);

                y=r[i][j].first;
                x=r[i][j].second;
				addNode(id(i,j),id(y,x-1),mot[id(i,j)]+1);
			}
		}


    priority_queue<pair<int,int>> q;
    q.push(MP(0,st));
    dist[st]=0;
    while(!q.empty())
	{
        int v=-1;
        do
		{
			v=q.top().second;
            q.pop();
		}while(used[v] && !q.empty());

        if(used[v]==1 && v==-1)
            break;
        used[v]=1;

		for(int i=0;i<g[v].size();i++)
		{
            int to=g[v][i].first;
            int D=g[v][i].second;
            if(dist[to]>D+dist[v])
			{
				dist[to]=D+dist[v];
                q.push(MP(-dist[to],to));
			}
		}
	}

	cout<<dist[en]<<endl;

    return 0;
}


/*

15 10
.....C....
..........
..........
..........
..........
..........
..........
...S......
..........
..........
..........
..........
..........
..........
..........


*/

Compilation message

portals.cpp: In function 'int main()':
portals.cpp:111:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
             if(a[i][j]!='#' && a[i-1][j]=='#' || a[i+1][j]=='#' || a[i][j-1]=='#'|| a[i][j+1]=='#')
                ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
portals.cpp:138:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<g[v].size();i++)
                     ~^~~~~~~~~~~~
portals.cpp:199:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<g[v].size();i++)
               ~^~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 23 ms 24060 KB Output is correct
4 Correct 24 ms 23964 KB Output is correct
5 Correct 24 ms 24056 KB Output is correct
6 Correct 24 ms 24056 KB Output is correct
7 Correct 24 ms 24056 KB Output is correct
8 Correct 23 ms 24056 KB Output is correct
9 Correct 23 ms 23928 KB Output is correct
10 Correct 25 ms 23928 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 23800 KB Output is correct
2 Correct 23 ms 24056 KB Output is correct
3 Correct 29 ms 24056 KB Output is correct
4 Correct 23 ms 24052 KB Output is correct
5 Correct 23 ms 24056 KB Output is correct
6 Correct 23 ms 24056 KB Output is correct
7 Correct 24 ms 24056 KB Output is correct
8 Correct 24 ms 24056 KB Output is correct
9 Correct 26 ms 25052 KB Output is correct
10 Correct 26 ms 25080 KB Output is correct
11 Correct 25 ms 24952 KB Output is correct
12 Correct 25 ms 24952 KB Output is correct
13 Correct 36 ms 24884 KB Output is correct
14 Correct 24 ms 23928 KB Output is correct
15 Correct 25 ms 24928 KB Output is correct
16 Correct 24 ms 24056 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23928 KB Output is correct
2 Correct 24 ms 24080 KB Output is correct
3 Correct 25 ms 24056 KB Output is correct
4 Correct 24 ms 24060 KB Output is correct
5 Correct 46 ms 30840 KB Output is correct
6 Correct 41 ms 30712 KB Output is correct
7 Correct 42 ms 30840 KB Output is correct
8 Correct 39 ms 30968 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 24 ms 24056 KB Output is correct
4 Correct 23 ms 23932 KB Output is correct
5 Correct 23 ms 24056 KB Output is correct
6 Correct 24 ms 24056 KB Output is correct
7 Correct 23 ms 24056 KB Output is correct
8 Correct 24 ms 24056 KB Output is correct
9 Correct 26 ms 24952 KB Output is correct
10 Correct 25 ms 25000 KB Output is correct
11 Correct 25 ms 24952 KB Output is correct
12 Correct 25 ms 24952 KB Output is correct
13 Correct 25 ms 24952 KB Output is correct
14 Correct 40 ms 30712 KB Output is correct
15 Correct 41 ms 30712 KB Output is correct
16 Correct 52 ms 30968 KB Output is correct
17 Correct 42 ms 30840 KB Output is correct
18 Correct 46 ms 31352 KB Output is correct
19 Correct 51 ms 32120 KB Output is correct
20 Correct 48 ms 31992 KB Output is correct
21 Correct 42 ms 30840 KB Output is correct
22 Correct 42 ms 30712 KB Output is correct
23 Correct 42 ms 30840 KB Output is correct
24 Correct 48 ms 31964 KB Output is correct
25 Correct 24 ms 23928 KB Output is correct
26 Correct 25 ms 24952 KB Output is correct
27 Correct 24 ms 24056 KB Output is correct
28 Correct 40 ms 30968 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 23928 KB Output is correct
2 Correct 23 ms 24052 KB Output is correct
3 Correct 24 ms 24056 KB Output is correct
4 Correct 24 ms 24056 KB Output is correct
5 Correct 24 ms 24056 KB Output is correct
6 Correct 23 ms 24056 KB Output is correct
7 Correct 24 ms 24056 KB Output is correct
8 Correct 24 ms 24056 KB Output is correct
9 Correct 26 ms 25080 KB Output is correct
10 Correct 26 ms 25080 KB Output is correct
11 Correct 25 ms 24956 KB Output is correct
12 Correct 25 ms 24952 KB Output is correct
13 Correct 25 ms 24952 KB Output is correct
14 Correct 48 ms 30712 KB Output is correct
15 Correct 44 ms 30840 KB Output is correct
16 Correct 47 ms 30968 KB Output is correct
17 Correct 43 ms 30968 KB Output is correct
18 Correct 45 ms 31352 KB Output is correct
19 Correct 50 ms 31992 KB Output is correct
20 Correct 48 ms 31992 KB Output is correct
21 Correct 40 ms 30712 KB Output is correct
22 Correct 41 ms 30712 KB Output is correct
23 Correct 42 ms 30840 KB Output is correct
24 Runtime error 333 ms 196552 KB Execution killed with signal 11 (could be triggered by violating memory limits)
25 Halted 0 ms 0 KB -