oj.uz

Submission #101449

# Submission time Handle Problem Language Result Execution time Memory
101449 2019-03-19T02:25:10 Z rocketninja7 Tracks in the Snow (BOI13_tracks) C++14
84.6875 / 100
 2000 ms 106048 KB 
#include <cstdio>
#include <vector>
#include <queue>
#include <algorithm>
using namespace std;

pair<int, int> dir[]={make_pair(0, -1), make_pair(1, 0), make_pair(0, 1), make_pair(-1, 0)};

int main(){
    int H, W;
    scanf("%d%d", &H, &W);
    char grid[H][W+1];
    for(int i=0;i<H;i++){
        scanf("%s", &grid[i]);
    }
    int dist[H][W];
    for(int i=0;i<H;i++){
        for(int j=0;j<W;j++){
            dist[i][j]=-1;
        }
    }
    dist[0][0]=1;
    priority_queue<pair<int, pair<int, int> > > proc;
    proc.push(make_pair(-1, make_pair(0, 0)));
    while(!proc.empty()){
        int x=proc.top().second.first, y=proc.top().second.second;
        proc.pop();
        for(int i=0;i<4;i++){
            if(x+dir[i].first>-1&&x+dir[i].first<H&&y+dir[i].second>-1&&y+dir[i].second<W){
                if(grid[x+dir[i].first][y+dir[i].second]!='.'){
                    if(dist[x+dir[i].first][y+dir[i].second]==-1){
                        if(grid[x+dir[i].first][y+dir[i].second]==grid[x][y]){
                            dist[x+dir[i].first][y+dir[i].second]=dist[x][y];
                        }
                        else{
                            dist[x+dir[i].first][y+dir[i].second]=dist[x][y]+1;
                        }
                        proc.push(make_pair(-dist[x+dir[i].first][y+dir[i].second], make_pair(x+dir[i].first, y+dir[i].second)));
                    }
                }
            }
        }
    }
    int ans=1;
    for(int i=0;i<H;i++){
        for(int j=0;j<W;j++){
            ans=max(ans, dist[i][j]);
        }
    }
    printf("%d", ans);
    return 0;
}

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:14:29: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[(W + 1)]' [-Wformat=]
         scanf("%s", &grid[i]);
                     ~~~~~~~~^
tracks.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &H, &W);
     ~~~~~^~~~~~~~~~~~~~~~
tracks.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", &grid[i]);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 1920 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 41 ms 1728 KB Output is correct
5 Correct 7 ms 768 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 7 ms 640 KB Output is correct
11 Correct 12 ms 656 KB Output is correct
12 Correct 21 ms 896 KB Output is correct
13 Correct 4 ms 768 KB Output is correct
14 Correct 7 ms 768 KB Output is correct
15 Correct 47 ms 1912 KB Output is correct
16 Correct 52 ms 1912 KB Output is correct
17 Correct 28 ms 1664 KB Output is correct
18 Correct 45 ms 1720 KB Output is correct

Subtask #2
54.6875 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 165 ms 9556 KB Output is correct
3 Correct 492 ms 84344 KB Output is correct
4 Correct 162 ms 21116 KB Output is correct
5 Correct 235 ms 47864 KB Output is correct
6 Execution timed out 2041 ms 106048 KB Time limit exceeded
7 Correct 4 ms 512 KB Output is correct
8 Correct 4 ms 640 KB Output is correct
9 Correct 9 ms 640 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 4 ms 640 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 143 ms 9292 KB Output is correct
14 Correct 81 ms 5616 KB Output is correct
15 Correct 33 ms 6124 KB Output is correct
16 Correct 66 ms 4224 KB Output is correct
17 Correct 342 ms 21624 KB Output is correct
18 Correct 123 ms 21308 KB Output is correct
19 Correct 165 ms 19840 KB Output is correct
20 Correct 114 ms 18296 KB Output is correct
21 Correct 279 ms 47892 KB Output is correct
22 Correct 218 ms 50680 KB Output is correct
23 Correct 703 ms 38520 KB Output is correct
24 Correct 183 ms 45432 KB Output is correct
25 Correct 607 ms 78564 KB Output is correct
26 Correct 1784 ms 60564 KB Output is correct
27 Execution timed out 2024 ms 81864 KB Time limit exceeded
28 Execution timed out 2031 ms 103384 KB Time limit exceeded
29 Execution timed out 2059 ms 91156 KB Time limit exceeded
30 Execution timed out 2027 ms 89424 KB Time limit exceeded
31 Execution timed out 2056 ms 51440 KB Time limit exceeded
32 Execution timed out 2044 ms 80364 KB Time limit exceeded