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Submission #940991

# Submission time Handle Problem Language Result Execution time Memory
940991 2024-03-08T04:38:52 Z Muhammad_Aneeq Portals (BOI14_portals) C++17
100 / 100
 415 ms 40528 KB 
/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/
 
#include <iostream>
#include <set>
#include <vector>
using namespace std;
int y[4]={0,0,1,-1},x[4]={1,-1,0,0};
int const N=1010;
char a[N][N]={};
int n,m;
int ans=1e9+10;
bool vis[N][N][8]={};
int dist[N][N]={};
pair<int,int>por[N][N][4]={};
int dis(pair<int,int>a,pair<int,int>b)
{
    return abs(a.first-b.first)+abs(b.second-a.second);
}
bool check(int i,int j,int dir)
{
    if (i<=0||i>n||j<=0||j>m||a[i][j]=='#')
        return 0;
    return 1;
}
void bfs(int i,int j)
{
    set<vector<int>>ind;
    ind.insert({0,i,j,-1});
    while (ind.size())
    {
        vector<int>z=*begin(ind);
        ind.erase(z);
        if (a[z[1]][z[2]]=='C')
            continue;
        for (int i=0;i<4;i++)
        {
            int f=1e9+10;
            for (int j=0;j<4;j++)
                f=min(f,dis({z[1],z[2]},por[z[1]][z[2]][j])+(i!=j));
            if (check(por[z[1]][z[2]][i].first,por[z[1]][z[2]][i].second,i+4)&&dist[por[z[1]][z[2]][i].first][por[z[1]][z[2]][i].second]>z[0]+f)
            {
                dist[por[z[1]][z[2]][i].first][por[z[1]][z[2]][i].second]=z[0]+f;
                ind.insert({z[0]+f,por[z[1]][z[2]][i].first,por[z[1]][z[2]][i].second,i+4});
            }
        }
        for (int i=0;i<4;i++)
        {
            if (check(z[1]+x[i],z[2]+y[i],i)&&dist[z[1]+x[i]][z[2]+y[i]]>z[0]+1)
            {
                dist[z[1]+x[i]][z[2]+y[i]]=z[0]+1;
                ind.insert({z[0]+1,z[1]+x[i],z[2]+y[i],i});
            }
        }
    }
}
inline void solve()
{
    cin>>n>>m;
    int sti=0,stj=0,eni=0,enj=0;
    for (int i=1;i<=n;i++)
        for (int j=1;j<=m;j++)
        {
            cin>>a[i][j];
            if (a[i][j]=='S')
                sti=i,stj=j;
            if (a[i][j]=='C')
                eni=i,enj=j;
            dist[i][j]=1e9+10;
        }
    for (int i=0;i<=n;i++)
    {
        a[i][0]='#';
        a[i][m+1]='#';
    }
    for (int i=0;i<=m;i++)
    {
        a[0][i]='#';
        a[n+1][i]='#';
    }
    for (int j=1;j<=m;j++)
        for (int i=1;i<=n;i++)
        {
            if (a[i][j]!='#')
            {
                int k=i;
                while (a[k][j]!='#')
                    k++;
                k--;
                for (int l=i;l<=k;+l++)
                {
                    por[l][j][0]={i,j};
                    por[l][j][1]={k,j};
                }
                i=k;
            }
        }
    for (int j=1;j<=n;j++)
    {
        for (int i=1;i<=m;i++)
        {
            if (a[j][i]!='#')
            {
                int k=i;
                while (a[j][k]!='#')
                    k++;
                k--;
                for (int l=i;l<=k;l++)
                {
                    por[j][l][2]={j,i};
                    por[j][l][3]={j,k};
                }
                i=k;
            }
        }
    }
    pair<int,int>f={1,5};
    dist[sti][stj]=0;
    bfs(sti,stj);
    cout<<dist[eni][enj]<<endl;
}
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

Compilation message

portals.cpp: In function 'void solve()':
portals.cpp:94:35: warning: value computed is not used [-Wunused-value]
   94 |                 for (int l=i;l<=k;+l++)
      |                                   ^~~~
portals.cpp:121:18: warning: variable 'f' set but not used [-Wunused-but-set-variable]
  121 |     pair<int,int>f={1,5};
      |                  ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 2 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 4564 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4444 KB Output is correct
10 Correct 2 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 2 ms 4444 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 2 ms 4444 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 8 ms 10844 KB Output is correct
6 Correct 9 ms 11036 KB Output is correct
7 Correct 10 ms 10844 KB Output is correct
8 Correct 6 ms 10972 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 4440 KB Output is correct
6 Correct 1 ms 4440 KB Output is correct
7 Correct 1 ms 4440 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 2 ms 4444 KB Output is correct
10 Correct 2 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 2 ms 4440 KB Output is correct
14 Correct 8 ms 10844 KB Output is correct
15 Correct 9 ms 10844 KB Output is correct
16 Correct 11 ms 11036 KB Output is correct
17 Correct 11 ms 11052 KB Output is correct
18 Correct 14 ms 11352 KB Output is correct
19 Correct 15 ms 11112 KB Output is correct
20 Correct 13 ms 11100 KB Output is correct
21 Correct 8 ms 10844 KB Output is correct
22 Correct 9 ms 10840 KB Output is correct
23 Correct 11 ms 10844 KB Output is correct
24 Correct 12 ms 11044 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 1 ms 4440 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 5 ms 10832 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4556 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 4440 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4444 KB Output is correct
10 Correct 2 ms 4440 KB Output is correct
11 Correct 2 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 8 ms 10832 KB Output is correct
15 Correct 10 ms 10844 KB Output is correct
16 Correct 11 ms 10844 KB Output is correct
17 Correct 12 ms 10844 KB Output is correct
18 Correct 18 ms 11312 KB Output is correct
19 Correct 15 ms 11108 KB Output is correct
20 Correct 13 ms 11100 KB Output is correct
21 Correct 8 ms 10840 KB Output is correct
22 Correct 9 ms 10844 KB Output is correct
23 Correct 13 ms 11020 KB Output is correct
24 Correct 301 ms 39892 KB Output is correct
25 Correct 415 ms 40528 KB Output is correct
26 Correct 361 ms 39900 KB Output is correct
27 Correct 355 ms 40140 KB Output is correct
28 Correct 210 ms 39492 KB Output is correct
29 Correct 219 ms 39508 KB Output is correct
30 Correct 249 ms 39544 KB Output is correct
31 Correct 13 ms 10844 KB Output is correct
32 Correct 344 ms 39760 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 4444 KB Output is correct
35 Correct 261 ms 39684 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 5 ms 10844 KB Output is correct
38 Correct 120 ms 39348 KB Output is correct
39 Correct 166 ms 39408 KB Output is correct