oj.uz

Submission #129793

# Submission time Handle Problem Language Result Execution time Memory
129793 2019-07-13T08:53:22 Z davitmarg Portals (BOI14_portals) C++17
70 / 100
 85 ms 63480 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,used[1000006],dist[1000006],mot[1000006];
pair<int,int> u[1003][1003],d[1003][1003],l[1003][1003],r[1003][1003];
vector<pair<int,int>> g[1000006];
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)
{
    if(a==b)
		return;
	g[a].PB(MP(b,d));
}

int main()
{
    cin >> n >> m;
    k=n*m+m+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;
        //print(v);
		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:108:29: 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:135:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<g[v].size();i++)
                     ~^~~~~~~~~~~~
portals.cpp:195:16: 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 23928 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 23 ms 24056 KB Output is correct
4 Correct 24 ms 23932 KB Output is correct
5 Correct 25 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 24 ms 23928 KB Output is correct
10 Correct 24 ms 24052 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23928 KB Output is correct
2 Correct 23 ms 24056 KB Output is correct
3 Correct 23 ms 24020 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 24 ms 24056 KB Output is correct
6 Correct 28 ms 24184 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 27 ms 25084 KB Output is correct
11 Correct 24 ms 24952 KB Output is correct
12 Correct 25 ms 24952 KB Output is correct
13 Correct 25 ms 24948 KB Output is correct
14 Correct 23 ms 23928 KB Output is correct
15 Correct 25 ms 24956 KB Output is correct
16 Correct 24 ms 23928 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 23932 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 24056 KB Output is correct
5 Correct 46 ms 30072 KB Output is correct
6 Correct 46 ms 30200 KB Output is correct
7 Correct 42 ms 30584 KB Output is correct
8 Correct 35 ms 30200 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 23928 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 24 ms 24056 KB Output is correct
9 Correct 25 ms 25080 KB Output is correct
10 Correct 26 ms 25208 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 39 ms 30072 KB Output is correct
15 Correct 40 ms 30200 KB Output is correct
16 Correct 41 ms 30588 KB Output is correct
17 Correct 42 ms 30976 KB Output is correct
18 Correct 45 ms 31396 KB Output is correct
19 Correct 49 ms 32120 KB Output is correct
20 Correct 49 ms 32248 KB Output is correct
21 Correct 39 ms 30300 KB Output is correct
22 Correct 42 ms 30328 KB Output is correct
23 Correct 41 ms 30584 KB Output is correct
24 Correct 47 ms 32120 KB Output is correct
25 Correct 24 ms 23928 KB Output is correct
26 Correct 26 ms 24952 KB Output is correct
27 Correct 23 ms 23928 KB Output is correct
28 Correct 36 ms 30200 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 23800 KB Output is correct
2 Correct 23 ms 24056 KB Output is correct
3 Correct 24 ms 24056 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 24 ms 24056 KB Output is correct
6 Correct 25 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 24952 KB Output is correct
10 Correct 25 ms 25080 KB Output is correct
11 Correct 25 ms 24952 KB Output is correct
12 Correct 25 ms 24956 KB Output is correct
13 Correct 26 ms 24952 KB Output is correct
14 Correct 38 ms 30076 KB Output is correct
15 Correct 40 ms 30200 KB Output is correct
16 Correct 41 ms 30584 KB Output is correct
17 Correct 41 ms 30840 KB Output is correct
18 Correct 46 ms 31352 KB Output is correct
19 Correct 51 ms 32220 KB Output is correct
20 Correct 55 ms 32132 KB Output is correct
21 Correct 54 ms 30328 KB Output is correct
22 Correct 40 ms 30328 KB Output is correct
23 Correct 41 ms 30584 KB Output is correct
24 Incorrect 85 ms 63480 KB Output isn't correct
25 Halted 0 ms 0 KB -