oj.uz

Submission #670110

# Submission time Handle Problem Language Result Execution time Memory
670110 2022-12-08T06:53:03 Z nonono Nautilus (BOI19_nautilus) C++17
100 / 100
 304 ms 153872 KB 
#include "bits/stdc++.h"
using namespace std;

const char c[] = {'N', 'E', 'S', 'W'};

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

typedef bitset<250000> B;
const int mxN = 501, mxM = 5e3 + 1;

int n, m, q;
B dp[mxM], f, d, dd[5];
string s;

int change(int a, int b){
    return a * m + b;
}

int main(){
    #define file "nautilus"
    if(fopen(file".inp", "r")){
        freopen(file".inp", "r", stdin);
        freopen(file".out", "w", stdout);
    }

    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m >> q;

    for(int i = 0; i < n; i ++){
        for(int j = 0; j < m; j ++){
            char x; cin >> x;

            f[change(i, j)] = dp[0][change(i, j)] = (x == '.');
        }
    }

    cin >> s;

    for(int i = 0; i < n; i ++){
        for(int j = 0; j < m; j ++){
            d[change(i, j)] = 1;
        }
    }

    for(int i = 0; i < 4; i ++){
        dd[i] = d;

        if(i == 0){
            for(int j = 0; j < m; j ++)
                dd[i][change(0, j)] = 0;
        }

        if(i == 1){
            for(int j = 0; j < n; j ++)
                dd[i][change(j , m - 1)] = 0;
        }

        if(i == 2){
            for(int j = 0; j < m; j ++)
                dd[i][change(n - 1, j)] = 0;
        }

        if(i == 3){
            for(int j = 0; j < n; j ++)
                dd[i][change(j, 0)] = 0;
        }
    }

    for(int i = 0; i < q; i ++){
        for(int t = 0; t < 4; t ++){
            if(c[t] == s[i] || s[i] == '?'){
                int x = change(dx[t], dy[t]);
                if(x >= 0) dp[i + 1] |= ((dp[i] & dd[t]) << x);
                else dp[i + 1] |= ((dp[i] & dd[t]) >> abs(x));
            }
        }

        dp[i + 1] = (dp[i + 1] & f);
    }

    cout << (int)(dp[q].count()) << "\n";
    return 0;
}

Compilation message

nautilus.cpp: In function 'int main()':
nautilus.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(file".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(file".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3540 KB Output is correct
2 Correct 4 ms 3540 KB Output is correct
3 Correct 6 ms 3628 KB Output is correct
4 Correct 4 ms 3632 KB Output is correct
5 Correct 5 ms 3536 KB Output is correct
6 Correct 4 ms 3628 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3540 KB Output is correct
2 Correct 4 ms 3540 KB Output is correct
3 Correct 6 ms 3628 KB Output is correct
4 Correct 4 ms 3632 KB Output is correct
5 Correct 5 ms 3536 KB Output is correct
6 Correct 4 ms 3628 KB Output is correct
7 Correct 4 ms 3628 KB Output is correct
8 Correct 6 ms 3540 KB Output is correct
9 Correct 8 ms 3632 KB Output is correct
10 Correct 5 ms 3540 KB Output is correct
11 Correct 5 ms 3540 KB Output is correct
12 Correct 5 ms 3636 KB Output is correct
13 Correct 6 ms 3540 KB Output is correct
14 Correct 6 ms 3540 KB Output is correct
15 Correct 6 ms 3632 KB Output is correct
16 Correct 6 ms 3540 KB Output is correct
17 Correct 7 ms 3540 KB Output is correct
18 Correct 12 ms 3544 KB Output is correct
19 Correct 11 ms 3572 KB Output is correct
20 Correct 7 ms 3612 KB Output is correct
21 Correct 7 ms 3540 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3540 KB Output is correct
2 Correct 4 ms 3540 KB Output is correct
3 Correct 6 ms 3628 KB Output is correct
4 Correct 4 ms 3632 KB Output is correct
5 Correct 5 ms 3536 KB Output is correct
6 Correct 4 ms 3628 KB Output is correct
7 Correct 4 ms 3628 KB Output is correct
8 Correct 6 ms 3540 KB Output is correct
9 Correct 8 ms 3632 KB Output is correct
10 Correct 5 ms 3540 KB Output is correct
11 Correct 5 ms 3540 KB Output is correct
12 Correct 5 ms 3636 KB Output is correct
13 Correct 6 ms 3540 KB Output is correct
14 Correct 6 ms 3540 KB Output is correct
15 Correct 6 ms 3632 KB Output is correct
16 Correct 6 ms 3540 KB Output is correct
17 Correct 7 ms 3540 KB Output is correct
18 Correct 12 ms 3544 KB Output is correct
19 Correct 11 ms 3572 KB Output is correct
20 Correct 7 ms 3612 KB Output is correct
21 Correct 7 ms 3540 KB Output is correct
22 Correct 188 ms 153676 KB Output is correct
23 Correct 212 ms 153672 KB Output is correct
24 Correct 203 ms 153720 KB Output is correct
25 Correct 190 ms 153700 KB Output is correct
26 Correct 182 ms 153684 KB Output is correct
27 Correct 259 ms 153692 KB Output is correct
28 Correct 249 ms 153676 KB Output is correct
29 Correct 245 ms 153792 KB Output is correct
30 Correct 241 ms 153676 KB Output is correct
31 Correct 233 ms 153740 KB Output is correct
32 Correct 304 ms 153684 KB Output is correct
33 Correct 281 ms 153872 KB Output is correct
34 Correct 287 ms 153740 KB Output is correct
35 Correct 284 ms 153748 KB Output is correct
36 Correct 301 ms 153752 KB Output is correct