oj.uz

Submission #101578

# Submission time Handle Problem Language Result Execution time Memory
101578 2019-03-19T04:38:32 Z dantoh000 Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 1742 ms 113192 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
int dx[] = {1,0,-1,0}, dy[] = {0,1,0,-1};
int main(){
    int h,w;
    scanf("%d%d",&h,&w);
    char grid[h][w];
    int nonempty = 0;
    for (int i = 0; i < h; i++){
        for (int j = 0; j < w; j++){
            scanf(" %c",&grid[i][j]);
            if (grid[i][j] != '.') nonempty++;
        }
    }
    int num = 0;
    int vis[h][w];
    int ans = 1;
    char a = grid[0][0];
    char b = a^'F'^'R';
    memset(vis,0,sizeof(vis));
    deque<ii> q;
    q.push_back(ii(0,0));
    vis[0][0] = 1;
    while(q.size()){
        ii cur = q.front(); q.pop_front();
        int x = cur.first, y = cur.second;
        for (int k = 0; k < 4; k++){
            int nx = x + dx[k], ny = y + dy[k];
            if (nx >= 0 && nx < h && ny >= 0 && ny < w && vis[nx][ny] == 0 && grid[nx][ny] != '.'){
                if (grid[nx][ny] == grid[x][y]){
                    vis[nx][ny] = vis[x][y];
                    q.push_front(ii(nx,ny));
                }
                else{
                    vis[nx][ny] = vis[x][y]+1;
                    q.push_back(ii(nx,ny));
                }
                ans = max(ans,vis[nx][ny]);
                //printf("%d %d %d\n",vis[nx][ny],nx,ny);
            }
        }
    }
    printf("%d",ans);


}

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:16:9: warning: unused variable 'num' [-Wunused-variable]
     int num = 0;
         ^~~
tracks.cpp:20:10: warning: unused variable 'b' [-Wunused-variable]
     char b = a^'F'^'R';
          ^
tracks.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&h,&w);
     ~~~~~^~~~~~~~~~~~~~
tracks.cpp:12:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c",&grid[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 1528 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 15 ms 1280 KB Output is correct
5 Correct 7 ms 768 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 11 ms 256 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 7 ms 768 KB Output is correct
11 Correct 6 ms 512 KB Output is correct
12 Correct 10 ms 768 KB Output is correct
13 Correct 12 ms 768 KB Output is correct
14 Correct 8 ms 768 KB Output is correct
15 Correct 38 ms 1536 KB Output is correct
16 Correct 36 ms 1528 KB Output is correct
17 Correct 22 ms 1536 KB Output is correct
18 Correct 25 ms 1280 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 127 ms 7928 KB Output is correct
3 Correct 1187 ms 78588 KB Output is correct
4 Correct 266 ms 18780 KB Output is correct
5 Correct 734 ms 44572 KB Output is correct
6 Correct 1742 ms 92668 KB Output is correct
7 Correct 7 ms 512 KB Output is correct
8 Correct 6 ms 640 KB Output is correct
9 Correct 9 ms 640 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 137 ms 7964 KB Output is correct
14 Correct 78 ms 4728 KB Output is correct
15 Correct 81 ms 5240 KB Output is correct
16 Correct 74 ms 3448 KB Output is correct
17 Correct 431 ms 20224 KB Output is correct
18 Correct 388 ms 19880 KB Output is correct
19 Correct 301 ms 18680 KB Output is correct
20 Correct 263 ms 17248 KB Output is correct
21 Correct 669 ms 45896 KB Output is correct
22 Correct 734 ms 44360 KB Output is correct
23 Correct 714 ms 38280 KB Output is correct
24 Correct 675 ms 45020 KB Output is correct
25 Correct 1332 ms 78828 KB Output is correct
26 Correct 1121 ms 110516 KB Output is correct
27 Correct 1568 ms 113192 KB Output is correct
28 Correct 1586 ms 92780 KB Output is correct
29 Correct 1640 ms 90292 KB Output is correct
30 Correct 1647 ms 96324 KB Output is correct
31 Correct 1298 ms 50988 KB Output is correct
32 Correct 1678 ms 102980 KB Output is correct