oj.uz

Submission #885044

# Submission time Handle Problem Language Result Execution time Memory
885044 2023-12-08T20:46:35 Z tigar Tracks in the Snow (BOI13_tracks) C++14
97.8125 / 100
 1365 ms 1048576 KB 
#include <bits/stdc++.h>

using namespace std;

int w, h, ans;
char snow[4040][4040];
int check[4040][4040];
queue<pair< pair<int, int>, int> >ord;
int brr=1;

void dfs(int x, int y, int br)
{
    //cout<<br<<"\n";
    if(x-1>0)
    {
        if(snow[x-1][y]==snow[x][y] and check[x-1][y]==0){check[x-1][y]=br; dfs(x-1, y, br);}
        else if(snow[x-1][y]!='.')
        {
            if(check[x-1][y]==0){ord.push({{x-1, y}, br+1});}
        }
        else if(snow[x-1][y]=='.')check[x-1][y]=-1;
    }
    if(x+1<=h)
    {
        if(snow[x][y]==snow[x+1][y] and check[x+1][y]==0){check[x+1][y]=br; dfs(x+1, y, br);}
        else if(snow[x+1][y]!='.')
        {
            if(check[x+1][y]==0){ord.push({{x+1, y}, br+1});}
        }
        else if(snow[x+1][y]=='.')check[x+1][y]=-1;
    }
    if(y-1>0)
    {
        if(snow[x][y]==snow[x][y-1] and check[x][y-1]==0){check[x][y-1]=br; dfs(x, y-1, br);}
        else if(snow[x][y-1]!='.')
        {
            if(check[x][y-1]==0){ord.push({{x, y-1}, br+1});}
        }
        else if(snow[x][y-1]=='.')check[x][y-1]=-1;
    }
    if(y+1<=w)
    {
        if(snow[x][y]==snow[x][y+1] and check[x][y+1]==0){check[x][y+1]=br; dfs(x, y+1, br);}
        else if(snow[x][y+1]!='.')
        {
            if(check[x][y+1]==0){ord.push({{x, y+1}, br+1});}
        }
        else if(snow[x][y+1]=='.')check[x][y+1]=-1;
    }
    return;
}

int main()
{
    cin>>h>>w;
    for(int i=1; i<=h; i++)
    {
        for(int j=1; j<=w; j++)cin>>snow[i][j];
    }
    ord.push({{1, 1}, 1});
    while(!ord.empty())
    {
        int xx=ord.front().first.first, yy=ord.front().first.second, bb=ord.front().second;
        ord.pop();
        if(!check[xx][yy])
        {
            check[xx][yy]=bb;
            dfs(xx, yy, bb);
            ans=max(ans, bb);
        }
    }
    //for(int i=1; i<=h; i++){for(int j=1; j<=w; j++)cout<<check[i][j]; cout<<endl;}
    cout<<ans;
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 7184 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2492 KB Output is correct
4 Correct 17 ms 7512 KB Output is correct
5 Correct 5 ms 3932 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Correct 4 ms 3672 KB Output is correct
11 Correct 4 ms 4444 KB Output is correct
12 Correct 8 ms 4040 KB Output is correct
13 Correct 5 ms 4036 KB Output is correct
14 Correct 4 ms 3932 KB Output is correct
15 Correct 17 ms 7864 KB Output is correct
16 Correct 18 ms 7304 KB Output is correct
17 Correct 13 ms 9640 KB Output is correct
18 Correct 11 ms 7512 KB Output is correct

Subtask #2
67.8125 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 31580 KB Output is correct
2 Correct 83 ms 22100 KB Output is correct
3 Correct 622 ms 79032 KB Output is correct
4 Correct 162 ms 37664 KB Output is correct
5 Correct 383 ms 65080 KB Output is correct
6 Correct 1051 ms 219664 KB Output is correct
7 Correct 11 ms 33152 KB Output is correct
8 Correct 13 ms 31748 KB Output is correct
9 Correct 3 ms 4956 KB Output is correct
10 Correct 2 ms 2500 KB Output is correct
11 Correct 11 ms 32348 KB Output is correct
12 Correct 2 ms 3164 KB Output is correct
13 Correct 75 ms 22100 KB Output is correct
14 Correct 51 ms 15184 KB Output is correct
15 Correct 40 ms 13284 KB Output is correct
16 Correct 33 ms 7772 KB Output is correct
17 Correct 188 ms 36508 KB Output is correct
18 Correct 162 ms 34644 KB Output is correct
19 Correct 153 ms 37716 KB Output is correct
20 Correct 136 ms 28248 KB Output is correct
21 Correct 361 ms 58896 KB Output is correct
22 Correct 387 ms 64860 KB Output is correct
23 Correct 365 ms 52656 KB Output is correct
24 Correct 342 ms 64336 KB Output is correct
25 Correct 730 ms 88360 KB Output is correct
26 Runtime error 1164 ms 1048576 KB Execution killed with signal 9
27 Correct 1352 ms 821604 KB Output is correct
28 Correct 1030 ms 211372 KB Output is correct
29 Correct 1008 ms 204628 KB Output is correct
30 Correct 1139 ms 392064 KB Output is correct
31 Correct 699 ms 67500 KB Output is correct
32 Correct 1365 ms 726692 KB Output is correct