Submission #1151502

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151502		Robert_junior	Nautilus (BOI19_nautilus)	C++20	66 / 100	119 ms	327680 KiB

nautilus

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define ins insert
#define pb push_back
#define F first
#define S second
const int N = 2e5+100, M = 5e5 + 7;
const int mod = 1e9 + 7;
int a[501][501], dp[501][501][502];
int dr[4] = {1, -1, 0, 0};
int dc[4] = {0, 0, 1, -1};
char dd[4] = {'S', 'N', 'E', 'W'};
char b[5001];
void solve(){
    int n, m, k;
    cin>>n>>m>>k;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            char c;
            cin>>c;
            if(c == '#') a[i][j] = 1;
            else dp[i][j][1] = 1;
        }
    }
    for(int i = 1; i <= k; i++){
        cin>>b[i];
    }
    for(int l = 1; l <= k; l++){
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= m; j++){
                if(!dp[i][j][l]) continue;
                if(b[l] == '?'){
                    for(int o = 0; o < 4; o++){
                        int x = dr[o] + i, y = dc[o] + j;
                        if(x >= 1 && x <= n && y >= 1 && y <= m && !a[x][y]){
                            dp[x][y][l + 1] = 1;
                        }
                    }
                }
                else{
                    for(int o = 0; o < 4; o++){
                        if(b[l] != dd[o]) continue;
                        int x = dr[o] + i, y = dc[o] + j;
                        if(x >= 1 && x <= n && y >= 1 && y <= m && !a[x][y]){
                            dp[x][y][l + 1] = 1;
                        }
                    }
                }
            }
        }
    }
    int ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            if(dp[i][j][k + 1]) ans++;
        }
    }
    cout<<ans;
}
main(){
    ios_base :: sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1;
    //cin>>t; 
    for(int i = 1; i <= t; i++){
        //cout<<"Case "<<i<<": ";
        solve();
    }
}

Compilation message (stderr)

nautilus.cpp:62:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main(){
      | ^~~~

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