Submission #1106738

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106738		underwaterkillerwhale	Nautilus (BOI19_nautilus)	C++17	100 / 100	132 ms	159056 KiB

nautilus

#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i=a;i<=b;i++)
#define rep2(i,a,b,c) for (int i=a;i<=b;i+=c)
#define rev(i,a,b) for (int i=a;i>=b;i--)
#define rev2(i,a,b,c) for (int i=a;i>=b;i-=c)
#define ii pair<ll,ll>
#define bit(i,j) ((i>>j)&1)
#define ull unsigned long long
#define pb push_back
#define pf push_front
#define ll long long
#define F first
#define S second
#define sz(a) (ll)(a.size())
#define on(n) __builtin_popcountll(n)
#define ld long double
#define __log2(x) 31-__builtin_clz(x)
#define Mask(x) (1LL<<x)
#define ALL(v) v.begin(),v.end()

const int N=5e3+5;
const int mod=1e9+7;
const int INF=1e9;
const int MAX=1e9;

int n,m,k;
string s;
char a[505][505];
bitset<505> dp[N][505],mask[505];

void solution(){
    cin >> n >> m >> k;
    rep(i,1,n) rep(j,1,m) cin >> a[i][j];
    cin >> s;
    s=' '+s;
    rep(i,1,n) rep(j,1,m)
        if (a[i][j]=='.') dp[0][i].set(j),mask[i].set(j);
    rep(i,1,k)
        rep(row,1,n){
            if (s[i]=='N'||s[i]=='?') dp[i][row]|=dp[i-1][row+1];
            if (s[i]=='S'||s[i]=='?') dp[i][row]|=dp[i-1][row-1];
            if (s[i]=='E'||s[i]=='?') dp[i][row]|=(dp[i-1][row]<<1);
            if (s[i]=='W'||s[i]=='?') dp[i][row]|=(dp[i-1][row]>>1);
            dp[i][row]&=mask[row];
        }
    int res=0;
    rep(row,1,n) res+=dp[k][row].count();
    cout << res;
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int test=1;
    //cin >> test;
    while(test--)
        solution();
}

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