oj.uz

Submission #472006

# Submission time Handle Problem Language Result Execution time Memory
472006 2021-09-12T08:58:08 Z sudheerays123 Tracks in the Snow (BOI13_tracks) C++
100 / 100
 1116 ms 220996 KB 
#include <bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
#define tc ll test;cin >> test;while(test--)
#define vi vector<ll>
#define pll pair<ll,ll>
#define pb push_back
#define mp make_pair
#define INF 1e18
#define MOD 1e9 + 7
#define ff first
#define ss second
#define in >>
#define out <<
#define space << " " <<
#define spacef << " "
#define fo(i,a,b) for(ll i = a; i <= b; i++)
#define nextline out "\n"
#define print(x) for(auto i : x ) cout out i spacef
#define mmax(x,i) x = max(x,i)
#define mmin(x,i) x = min(x,i)
#define N 105

int main() {
    
    fast;

    ll n,m;
    cin in n in m;

    vector<vector<char>> grid(n+5,vector<char>(m+5,'.'));

    fo(i,1,n){
        fo(j,1,m){
            cin in grid[i][j];
        }
    }

    vector<vi> dist(n+5,vi(m+5,INF));
    deque<pll> q;
    ll ans = -INF;

    vi dx = {-1,1,0,0};
    vi dy = {0,0,-1,1};

    q.push_front({1,1});
    dist[1][1] = 1;

    while(!q.empty()){
        ll a = q.front().first;
        ll b = q.front().second;
        q.pop_front();

        mmax(ans,dist[a][b]);

        fo(t,0,3){
            ll aa = a+dx[t];
            ll bb = b+dy[t];

            if(aa >= 1 && aa <= n && bb >= 1 && bb <= m && grid[aa][bb] != '.'){
                if(grid[aa][bb] == grid[a][b] && dist[aa][bb] > dist[a][b]){
                    dist[aa][bb] = dist[a][b];
                    q.push_front({aa,bb});
                }
                else if(grid[aa][bb] != grid[a][b] && dist[aa][bb] > dist[a][b] + 1){
                    dist[aa][bb] = dist[a][b] + 1;
                    q.push_back({aa,bb});
                }
            }
        }
    }
    
    cout out ans;

    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 2764 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 10 ms 2316 KB Output is correct
5 Correct 3 ms 1088 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 3 ms 928 KB Output is correct
11 Correct 4 ms 844 KB Output is correct
12 Correct 7 ms 1216 KB Output is correct
13 Correct 4 ms 1100 KB Output is correct
14 Correct 4 ms 1092 KB Output is correct
15 Correct 19 ms 2892 KB Output is correct
16 Correct 20 ms 2876 KB Output is correct
17 Correct 13 ms 2748 KB Output is correct
18 Correct 10 ms 2252 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1228 KB Output is correct
2 Correct 72 ms 15804 KB Output is correct
3 Correct 509 ms 157556 KB Output is correct
4 Correct 133 ms 37324 KB Output is correct
5 Correct 272 ms 88760 KB Output is correct
6 Correct 1116 ms 183824 KB Output is correct
7 Correct 3 ms 1228 KB Output is correct
8 Correct 3 ms 1228 KB Output is correct
9 Correct 4 ms 1100 KB Output is correct
10 Correct 2 ms 716 KB Output is correct
11 Correct 3 ms 1228 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 72 ms 15692 KB Output is correct
14 Correct 40 ms 9288 KB Output is correct
15 Correct 35 ms 10264 KB Output is correct
16 Correct 36 ms 6708 KB Output is correct
17 Correct 188 ms 40320 KB Output is correct
18 Correct 143 ms 39744 KB Output is correct
19 Correct 125 ms 37316 KB Output is correct
20 Correct 111 ms 34196 KB Output is correct
21 Correct 290 ms 91860 KB Output is correct
22 Correct 297 ms 88772 KB Output is correct
23 Correct 376 ms 76480 KB Output is correct
24 Correct 278 ms 89844 KB Output is correct
25 Correct 766 ms 157416 KB Output is correct
26 Correct 687 ms 220996 KB Output is correct
27 Correct 952 ms 192408 KB Output is correct
28 Correct 1092 ms 183796 KB Output is correct
29 Correct 1085 ms 184384 KB Output is correct
30 Correct 1004 ms 183332 KB Output is correct
31 Correct 931 ms 101956 KB Output is correct
32 Correct 835 ms 188512 KB Output is correct