oj.uz

Submission #1043877

# Submission time Handle Problem Language Result Execution time Memory
1043877 2024-08-05T02:31:29 Z daviedu Tracks in the Snow (BOI13_tracks) C++17
31.7708 / 100
 386 ms 94516 KB 
#include <bits/stdc++.h>
using namespace std;

#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define ll long long

struct P{
    ll x, y;
};

void dbg_out() { cerr << endl; }
template <typename H, typename... T>
void dbg_out(H h, T... t) { cerr << ' ' << h; dbg_out(t...); }
#define dbg(...) { cerr << #__VA_ARGS__ << ':'; dbg_out(__VA_ARGS__); }


const int N = 4001;
char grid[N][N];
int dist[N][N];
int h, w;

int valid(int x, int y){
    return (0 <= x && x < h) && (0 <= y && y < w);
}

int dx[] = {1, -1, 0, 0};
int dy[] = {0, 0, 1, -1};

signed main(){
    fastio;
    cin >> h >> w;
    for (int i=0; i<h; i++){
        for (int j=0; j<w; j++){
            cin >> grid[i][j];
        }
    }

    memset(dist, -1, sizeof(dist));
    queue<pair<int, int>> q;
    int ans=1;
    dist[0][0] = 1;
    q.push({0, 0});
    while (!q.empty()){
        int x, y;
        tie(x, y) = q.front(); q.pop();
        for (int i=0; i<4; i++){
            int a, b;
            a = dx[i]+x;
            b = dy[i]+y;
            if (!valid(a, b) || grid[a][b] == '.') continue;
            int v = dist[x][y] + (grid[a][b] != grid[x][y]);
            if (dist[a][b] == -1) {
                dist[a][b] = v;
                q.push({a, b});
            }
            else dist[a][b] = min(dist[a][b], v);
        }
    }
    for (int i=0; i<h; i++){
        for (int j=0; j<w; j++){
            ans = max(ans, dist[i][j]);
        }
    }
    

    cout << ans << '\n';
}

Subtask #1
3.33333333333 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 66396 KB Output isn't correct
2 Correct 7 ms 64092 KB Output is correct
3 Incorrect 8 ms 64188 KB Output isn't correct
4 Incorrect 10 ms 66396 KB Output isn't correct
5 Incorrect 9 ms 64272 KB Output isn't correct
6 Correct 6 ms 64252 KB Output is correct
7 Incorrect 8 ms 64092 KB Output isn't correct
8 Incorrect 8 ms 64252 KB Output isn't correct
9 Incorrect 8 ms 64092 KB Output isn't correct
10 Incorrect 9 ms 64252 KB Output isn't correct
11 Incorrect 8 ms 64220 KB Output isn't correct
12 Incorrect 10 ms 64092 KB Output isn't correct
13 Incorrect 8 ms 64092 KB Output isn't correct
14 Incorrect 9 ms 64300 KB Output isn't correct
15 Incorrect 13 ms 66396 KB Output isn't correct
16 Incorrect 14 ms 66544 KB Output isn't correct
17 Incorrect 12 ms 66396 KB Output isn't correct
18 Incorrect 10 ms 66392 KB Output isn't correct

Subtask #2
28.4375 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 78428 KB Output is correct
2 Incorrect 30 ms 69836 KB Output isn't correct
3 Incorrect 164 ms 94292 KB Output isn't correct
4 Incorrect 54 ms 76116 KB Output isn't correct
5 Correct 129 ms 85328 KB Output is correct
6 Incorrect 357 ms 94396 KB Output isn't correct
7 Correct 9 ms 78684 KB Output is correct
8 Correct 10 ms 78596 KB Output is correct
9 Incorrect 8 ms 64312 KB Output isn't correct
10 Correct 8 ms 64204 KB Output is correct
11 Correct 10 ms 78428 KB Output is correct
12 Correct 8 ms 64272 KB Output is correct
13 Incorrect 35 ms 69884 KB Output isn't correct
14 Incorrect 20 ms 69244 KB Output isn't correct
15 Correct 20 ms 69192 KB Output is correct
16 Incorrect 17 ms 66908 KB Output isn't correct
17 Incorrect 76 ms 76348 KB Output isn't correct
18 Correct 55 ms 76116 KB Output is correct
19 Incorrect 53 ms 75856 KB Output isn't correct
20 Incorrect 44 ms 73556 KB Output isn't correct
21 Incorrect 117 ms 85584 KB Output isn't correct
22 Correct 129 ms 85292 KB Output is correct
23 Incorrect 122 ms 82004 KB Output isn't correct
24 Correct 128 ms 85424 KB Output is correct
25 Correct 258 ms 94144 KB Output is correct
26 Correct 301 ms 90544 KB Output is correct
27 Incorrect 365 ms 94292 KB Output isn't correct
28 Incorrect 365 ms 94392 KB Output isn't correct
29 Incorrect 386 ms 94288 KB Output isn't correct
30 Incorrect 351 ms 93776 KB Output isn't correct
31 Incorrect 256 ms 86352 KB Output isn't correct
32 Incorrect 340 ms 94516 KB Output isn't correct