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Submission #733566

# Submission time Handle Problem Language Result Execution time Memory
733566 2023-05-01T03:37:44 Z lucasSala Tracks in the Snow (BOI13_tracks) C++17
100 / 100
 736 ms 119104 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAX = 4e3+4;

char matriz[MAX][MAX];
int dist[MAX][MAX];

int n,m;

bool inBound(pair<int,int> a){
    int x = a.first, y = a.second;
    if(x < 0 or x >= n or y < 0 or y >= m or matriz[x][y] == '.' or dist[x][y] > 0){
        return false;
    }
    return true;
}

int main(){ios_base::sync_with_stdio(false); cin.tie(NULL);
    int ans = 1;
    cin >> n >> m;
    for(int i =0;i < n;i++){
        for(int j = 0; j < m;j++){
            cin >> matriz[i][j];
        }
    }
    deque<pair<int,int>> fila;
    dist[0][0] =1;
    fila.push_front({0,0});
    while(!fila.empty()){
        pair<int,int> atual = fila.front();
        fila.pop_front();
        int x = atual.first, y = atual.second;
        ans = max(ans,dist[x][y]);
        if(inBound({x+1,y})){
            if(matriz[x+1][y] == matriz[x][y]){
                dist[x+1][y] = dist[x][y];
                fila.push_front({x+1,y});
            }
            else{
                dist[x+1][y] = dist[x][y]+1;
                fila.push_back({x+1,y});
            }
        }
        if(inBound({x-1,y})){
            if(matriz[x-1][y] == matriz[x][y]){
                dist[x-1][y] = dist[x][y];
                fila.push_front({x-1,y});
            }
            else{
                dist[x-1][y] = dist[x][y]+1;
                fila.push_back({x-1,y});
            }
        }
        if(inBound({x,y+1})){
            if(matriz[x][y+1] == matriz[x][y]){
                dist[x][y+1] = dist[x][y];
                fila.push_front({x,y+1});
            }
            else{
                dist[x][y+1] = dist[x][y]+1;
                fila.push_back({x,y+1});
            }
        }
        if(inBound({x,y-1})){
            if(matriz[x][y-1] == matriz[x][y]){
                dist[x][y-1] = dist[x][y];
                fila.push_front({x,y-1});
            }
            else{
                dist[x][y-1] = dist[x][y]+1;
                fila.push_back({x,y-1});
            }
        }
    }
    cout << max(ans,dist[n-1][m-1]);
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 5204 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 9 ms 4988 KB Output is correct
5 Correct 4 ms 2772 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 3 ms 2388 KB Output is correct
11 Correct 3 ms 2132 KB Output is correct
12 Correct 6 ms 2900 KB Output is correct
13 Correct 3 ms 2864 KB Output is correct
14 Correct 3 ms 2900 KB Output is correct
15 Correct 12 ms 5004 KB Output is correct
16 Correct 13 ms 5120 KB Output is correct
17 Correct 10 ms 4948 KB Output is correct
18 Correct 9 ms 4948 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 30752 KB Output is correct
2 Correct 59 ms 13524 KB Output is correct
3 Correct 331 ms 57928 KB Output is correct
4 Correct 95 ms 29016 KB Output is correct
5 Correct 236 ms 44688 KB Output is correct
6 Correct 736 ms 92260 KB Output is correct
7 Correct 17 ms 32084 KB Output is correct
8 Correct 18 ms 30676 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 17 ms 31572 KB Output is correct
12 Correct 2 ms 1492 KB Output is correct
13 Correct 50 ms 13560 KB Output is correct
14 Correct 30 ms 9664 KB Output is correct
15 Correct 30 ms 12152 KB Output is correct
16 Correct 24 ms 5132 KB Output is correct
17 Correct 126 ms 24780 KB Output is correct
18 Correct 120 ms 31788 KB Output is correct
19 Correct 93 ms 29048 KB Output is correct
20 Correct 85 ms 22244 KB Output is correct
21 Correct 201 ms 43540 KB Output is correct
22 Correct 233 ms 44684 KB Output is correct
23 Correct 244 ms 36272 KB Output is correct
24 Correct 205 ms 41080 KB Output is correct
25 Correct 548 ms 78940 KB Output is correct
26 Correct 474 ms 119104 KB Output is correct
27 Correct 639 ms 105420 KB Output is correct
28 Correct 721 ms 92316 KB Output is correct
29 Correct 715 ms 90688 KB Output is correct
30 Correct 662 ms 95096 KB Output is correct
31 Correct 499 ms 63564 KB Output is correct
32 Correct 555 ms 90748 KB Output is correct