Submission #1016804

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016804		ByeWorld	Nautilus (BOI19_nautilus)	C++14	29 / 100	6 ms	1628 KiB

nautilus

#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 110;
const int MAXA = 110;
const int INF = 1e18+10;
const int LOG = 19;
const int MOD = 1e9+7;
const int SQRT = 450;
const vector<int> NOL = {};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const vector<int> dx = {1, -1, 0, 0};
const vector<int> dy = {0, 0, 1, -1};
void chmx(int &a, int b){ a = max(a, b); }

int n, m, k;
char c[MAXN][MAXN];
bool dp[MAXN][MAXN][MAXA];
string s;

bool valid(int x, int y){
    if(x<1||x>n||y<1||y>m||c[x][y]=='#') return 0;
    return 1;
}
signed main(){
    // ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m >> k;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) cin >> c[i][j];
    cin >> s; s = '.'+s;
    
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++)
            dp[i][j][k+1] = valid(i, j);
    

    for(int id=k; id>=1; id--){
        for(int i=1; i<=n; i++){
            for(int j=1; j<=m; j++){
                if(!valid(i, j)) continue;

                if(s[id] == '?'){
                    for(int pp=0; pp<4; pp++){
                        int nx = i+dx[pp], ny = j+dy[pp];
                        if(!valid(nx, ny)) continue;
                        dp[i][j][id] |= dp[nx][ny][id+1];
                    }
                } else {
                    int nx = -1, ny = -1;
                    if(s[id]=='W'){
                        nx = i, ny = j-1;
                        if(!valid(nx, ny)) continue;
                        dp[i][j][id] |= dp[nx][ny][id+1];

                    } else if(s[id]=='E'){
                        nx = i, ny = j+1;
                        if(!valid(nx, ny)) continue;
                        dp[i][j][id] |= dp[nx][ny][id+1];

                    } else if(s[id]=='N'){
                        nx = i-1, ny = j;
                        if(!valid(nx, ny)) continue;
                        dp[i][j][id] |= dp[nx][ny][id+1];

                    } else if(s[id]=='S'){
                        nx = i+1, ny = j;
                        if(!valid(nx, ny)) continue;
                        dp[i][j][id] |= dp[nx][ny][id+1];

                    }
                }
            }
        }
// cout << id << " kk\n";
//         for(int i=1; i<=n; i++)
//             for(int j=1; j<=m; j++) cout << dp[i][j][id] << " \n"[j==m];
    }

    int ANS = 0;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) ANS += dp[i][j][1];
        // for(int i=1; i<=n; i++)
        //     for(int j=1; j<=m; j++) cout << dp[i][j][1] << " \n"[j==m];
    cout << ANS << '\n';
}

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