oj.uz

Submission #896676

# Submission time Handle Problem Language Result Execution time Memory
896676 2024-01-01T20:57:21 Z Kodik Tracks in the Snow (BOI13_tracks) C++17
100 / 100
 637 ms 116836 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long  ll;
typedef long double ld;
typedef short int shit;

#define ff first
#define ss second


bool check(int n, int m, int y, int x){
    return x>=0&&x<m&&y>=0&&y<n;
}

int main(){
    ios_base::sync_with_stdio(false), cin.tie(NULL);
	// freopen("odometer.in", "r", stdin);
	// freopen("odometer.out", "w", stdout);
    int n, m;
    cin >> n >> m;
    vector<vector<char>> plain(n, vector<char>(m));
    vector<vector<int>> depth(n, vector<int>(m, 0));
    for(int i = 0; i < n; ++i){
        for(int j = 0; j < m; ++j){
            cin >> plain[i][j];
        }
    }
    int dy[] = {-1,0,1,0};
    int dx[] = {0,1,0,-1};
    int ans = 1;
    deque<pair<int,int>> dq;
    dq.push_back({0,0});
    depth[0][0] = 1;
    while (!dq.empty()){
        pair<int,int> coords = dq.front(); dq.pop_front();
        ans = max(ans, depth[coords.ff][coords.ss]);
        for(int i = 0; i < 4; ++i){
            int yy = coords.ff+dy[i];
            int xx = coords.ss+dx[i];
            if(check(n,m,yy,xx)){
                if(plain[yy][xx]!=plain[coords.ff][coords.ss]&plain[yy][xx]!='.'&&depth[yy][xx]==0){
                    dq.push_back({yy,xx});
                    depth[yy][xx] = depth[coords.ff][coords.ss] + 1;
                }else if(plain[yy][xx]==plain[coords.ff][coords.ss]&plain[yy][xx]!='.'&&depth[yy][xx]==0){
                    dq.push_front({yy,xx});
                    depth[yy][xx] = depth[coords.ff][coords.ss];
                }
            }
        }
    }
    cout << ans << '\n';
    return 0; 
}

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:42:33: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   42 |                 if(plain[yy][xx]!=plain[coords.ff][coords.ss]&plain[yy][xx]!='.'&&depth[yy][xx]==0){
tracks.cpp:45:39: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   45 |                 }else if(plain[yy][xx]==plain[coords.ff][coords.ss]&plain[yy][xx]!='.'&&depth[yy][xx]==0){

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 1968 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 6 ms 1372 KB Output is correct
5 Correct 2 ms 860 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 456 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 2 ms 604 KB Output is correct
12 Correct 5 ms 1032 KB Output is correct
13 Correct 2 ms 1116 KB Output is correct
14 Correct 2 ms 864 KB Output is correct
15 Correct 11 ms 1884 KB Output is correct
16 Correct 13 ms 1756 KB Output is correct
17 Correct 8 ms 1916 KB Output is correct
18 Correct 6 ms 1376 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 860 KB Output is correct
2 Correct 43 ms 9208 KB Output is correct
3 Correct 293 ms 87032 KB Output is correct
4 Correct 72 ms 20824 KB Output is correct
5 Correct 180 ms 49128 KB Output is correct
6 Correct 637 ms 101884 KB Output is correct
7 Correct 2 ms 860 KB Output is correct
8 Correct 2 ms 1052 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 ms 660 KB Output is correct
11 Correct 2 ms 860 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 44 ms 9220 KB Output is correct
14 Correct 26 ms 5468 KB Output is correct
15 Correct 18 ms 5980 KB Output is correct
16 Correct 23 ms 3932 KB Output is correct
17 Correct 117 ms 22608 KB Output is correct
18 Correct 79 ms 22352 KB Output is correct
19 Correct 72 ms 20816 KB Output is correct
20 Correct 65 ms 19444 KB Output is correct
21 Correct 168 ms 50928 KB Output is correct
22 Correct 180 ms 49236 KB Output is correct
23 Correct 229 ms 42576 KB Output is correct
24 Correct 163 ms 49740 KB Output is correct
25 Correct 457 ms 87236 KB Output is correct
26 Correct 341 ms 116836 KB Output is correct
27 Correct 466 ms 116816 KB Output is correct
28 Correct 635 ms 101808 KB Output is correct
29 Correct 617 ms 97784 KB Output is correct
30 Correct 563 ms 105552 KB Output is correct
31 Correct 574 ms 56656 KB Output is correct
32 Correct 441 ms 106760 KB Output is correct