Submission #926015

#	Time	Username	Problem	Language	Result	Execution time	Memory
926015		vjudge1	Nautilus (BOI19_nautilus)	C++17	0 / 100	1 ms	348 KiB

nautilus

// By ObeliX
#include <bits/stdc++.h>
#pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#include <unordered_map>
#include <cstddef>
#include <cassert>
#include <bitset>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cmath>
#include <queue>
#include <map>
#include <set>

using namespace std;

const long long N = 1e6 + 5;
const long long MOD = 1e7 + 7;
const long long inf = 1e18;

long long n , m , d , k;

int main(){
    //freopen( "cinema.in" , "r" , stdin );
    //freopen( "cinema.out" , "w" , stdout );
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m >> k;
    bitset <505> dp[4][505];
    char c[n+5][m+5];
    for ( int i = 0 ; i <= n + 1 ; i++ ) {
        for ( int j = 0 ; j <= m + 1 ; j++ ) {
            c[i][j] = '.';
        }
    }
    for ( int i = 1 ; i <= n ; i++ ) {
        for ( int j = 1 ; j <= m ; j++ ) {
            cin >> c[i][j];
            if ( c[i][j] == '.' ) {
                dp[1][i][j] = 1;
            } 
        }
    }
    string s;
    cin >> s;
    for ( int l = 0 ; l < k ; l++ ) {
        if ( s[l] == 'W' ) {
            for ( int i = 1 ; i <= n ; i++ ) {
                dp[2][i] = ( ( dp[1][i] >> 1 ) & dp[1][i] );
            }
        }
        if ( s[l] == 'E' ) {
            for ( int i = 1 ; i <= n ; i++ ) {
                dp[2][i] = ( ( dp[1][i] << 1 ) & dp[1][i] );
            }
        }
        if ( s[l] == 'S' ) {
            for ( int i = 1 ; i <= n ; i++ ) {
                dp[2][i] = ( dp[1][i] & dp[1][i-1] );
            }
        }
        if ( s[l] == 'N' ) {
            for ( int i = 1 ; i <= n ; i++ ) {
                dp[2][i] = ( dp[1][i] & dp[1][i+1] );
            }
        }
        for ( int i = 1 ; i <= n ; i++ ) {
            dp[1][i] = dp[2][i];
        }
    }
    long long ans = 0;
    for ( int i = 1 ; i <= n ; i++ ) {
        ans += dp[1][i].count();
    }
    cout << ans;
}

• Subtask 1: 0 / 29
• Subtask 2: 0 / 37
• Subtask 3: 0 / 34