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Submission #879536

# Submission time Handle Problem Language Result Execution time Memory
879536 2023-11-27T15:48:03 Z Shayan86 Nautilus (BOI19_nautilus) C++14
100 / 100
 47 ms 856 KB 
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#define Mp          make_pair
#define sep         ' '
#define endl        '\n'
#define F	        first
#define S	        second
#define pb          push_back
#define all(x)      (x).begin(),(x).end()
#define kill(res)	cout << res << '\n', exit(0);
#define set_dec(x)	cout << fixed << setprecision(x);
#define fast_io     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io     freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll N = 507;
const ll Q = 5007;
const ll Mod = 1e9 + 7;

ll n, m, q;

string s;
bitset<N> arr[N], dp[2][N];

int main(){
    fast_io;

    cin >> n >> m >> q;

    for(int i = 0; i < n; i++){
        for(int j = 0; j < m; j++){
            char c; cin >> c;
            if(c == '.') arr[i][j] = dp[0][i][j] = 1;
        }
    }

    cin >> s; s = "$" + s;

    for(int i = 1; i <= q; i++){
        int nw = i % 2;
        int pr = 1 - nw;

        if(s[i] == 'E'){
            for(int i = 0; i < n; i++) dp[nw][i]  = (dp[pr][i] << 1) & arr[i];
        }
        if(s[i] == 'W'){
            for(int i = 0; i < n; i++) dp[nw][i]  = (dp[pr][i] >> 1) & arr[i];
        }
        if(s[i] == 'N'){
            for(int i = 0; i < n-1; i++) dp[nw][i]  = dp[pr][i+1] & arr[i];
            dp[nw][n-1].reset();
        }
        if(s[i] == 'S'){
            for(int i = 1; i < n; i++) dp[nw][i]  = dp[pr][i-1] & arr[i];
            dp[nw][0].reset();
        }
        if(s[i] == '?'){
            for(int i = 1; i < n-1; i++) dp[nw][i] = arr[i] & (dp[pr][i-1] | dp[pr][i+1] | (dp[pr][i] >> 1) | (dp[pr][i] << 1));
            dp[nw][0] = arr[0] & (dp[pr][0+1] | (dp[pr][0] >> 1) | (dp[pr][0] << 1));
            dp[nw][n-1] = arr[n-1] & (dp[pr][n-2] | (dp[pr][n-1] >> 1) | (dp[pr][n-1] << 1));
        }
/*
        cout << i << endl;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                cout << dp[nw][i][j];
            }
            cout << endl;
        }
        cout << endl;
*/
    }

    ll res = 0;
    for(int i = 0; i < n; i++)
        for(int j = 0; j < m; j++)
            if(dp[q%2][i][j]) res++;

    cout << res;

}

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 24 ms 736 KB Output is correct
23 Correct 25 ms 604 KB Output is correct
24 Correct 25 ms 604 KB Output is correct
25 Correct 24 ms 604 KB Output is correct
26 Correct 23 ms 604 KB Output is correct
27 Correct 34 ms 600 KB Output is correct
28 Correct 35 ms 600 KB Output is correct
29 Correct 36 ms 816 KB Output is correct
30 Correct 35 ms 604 KB Output is correct
31 Correct 36 ms 604 KB Output is correct
32 Correct 42 ms 604 KB Output is correct
33 Correct 42 ms 824 KB Output is correct
34 Correct 43 ms 856 KB Output is correct
35 Correct 45 ms 604 KB Output is correct
36 Correct 47 ms 780 KB Output is correct