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Submission #283034

# Submission time Handle Problem Language Result Execution time Memory
283034 2020-08-25T08:55:19 Z egekabas Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 1463 ms 151816 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
int n, m;
int a[4009][4009];
int vis[4009][4009];
vector<pii> dir = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
queue<pii> q[2];
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    cin >> n >> m;
    for(int i = 0; i < n; ++i){
        string s;
        cin >> s;
        for(int j = 0; j < m; ++j){
            if(s[j] == 'F')
                a[i][j] = 0;
            else if(s[j] == 'R')
                a[i][j] = 1;
            else
                a[i][j] = -1;
        }
    }
    q[a[0][0]].push({0, 0});
    int cur = a[0][0];
    vis[0][0] = 1;
    int ans = 0;
    while(q[0].size() || q[1].size()){
        ++ans;
        while(q[cur].size()){
            pii x = q[cur].front();
            q[cur].pop();
            for(auto u : dir){
                int x1 = x.ff + u.ff;
                int y1 = x.ss + u.ss;
                if(x1 < 0 || x1 >= n || y1 < 0 || y1 >= m)
                    continue;
                if(a[x1][y1] != -1 && vis[x1][y1] == 0){
                    q[a[x1][y1]].push({x1, y1});
                    vis[x1][y1] = 1;
                }
            }
        }
        cur ^= 1;
    }
    cout << ans << '\n';
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 6528 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 11 ms 5760 KB Output is correct
5 Correct 4 ms 3328 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 1 ms 896 KB Output is correct
9 Correct 1 ms 1280 KB Output is correct
10 Correct 4 ms 2816 KB Output is correct
11 Correct 3 ms 2336 KB Output is correct
12 Correct 7 ms 3456 KB Output is correct
13 Correct 4 ms 3328 KB Output is correct
14 Correct 4 ms 3328 KB Output is correct
15 Correct 15 ms 6400 KB Output is correct
16 Correct 17 ms 6528 KB Output is correct
17 Correct 15 ms 6272 KB Output is correct
18 Correct 10 ms 5888 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31488 KB Output is correct
2 Correct 69 ms 21348 KB Output is correct
3 Correct 286 ms 120700 KB Output is correct
4 Correct 109 ms 47736 KB Output is correct
5 Correct 225 ms 88824 KB Output is correct
6 Correct 1463 ms 151688 KB Output is correct
7 Correct 21 ms 32896 KB Output is correct
8 Correct 20 ms 31480 KB Output is correct
9 Correct 2 ms 896 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 20 ms 32256 KB Output is correct
12 Correct 2 ms 1792 KB Output is correct
13 Correct 66 ms 21368 KB Output is correct
14 Correct 36 ms 14072 KB Output is correct
15 Correct 34 ms 17152 KB Output is correct
16 Correct 26 ms 8320 KB Output is correct
17 Correct 180 ms 44916 KB Output is correct
18 Correct 126 ms 51576 KB Output is correct
19 Correct 108 ms 47864 KB Output is correct
20 Correct 111 ms 39288 KB Output is correct
21 Correct 186 ms 89336 KB Output is correct
22 Correct 220 ms 88780 KB Output is correct
23 Correct 356 ms 73208 KB Output is correct
24 Correct 195 ms 85752 KB Output is correct
25 Correct 626 ms 141560 KB Output is correct
26 Correct 813 ms 122488 KB Output is correct
27 Correct 1132 ms 143188 KB Output is correct
28 Correct 1460 ms 151816 KB Output is correct
29 Correct 1380 ms 150408 KB Output is correct
30 Correct 1263 ms 146580 KB Output is correct
31 Correct 1043 ms 111480 KB Output is correct
32 Correct 975 ms 142324 KB Output is correct