Submission #925695

#	Time	Username	Problem	Language	Result	Execution time	Memory
925695		vjudge1	Nautilus (BOI19_nautilus)	C++17	29 / 100	1053 ms	600 KiB

nautilus

// #pragma GCC target ("avx2")
// #pragma GCC optimization ("O3")
// #pragma GCC optimization ("unroll-loops")

#include <bits/stdc++.h>

#define int long long
#define ff first
#define ss second
#define pb push_back
#define yes cout<<"Yes\n"
#define no cout<<"No\n"
#define no1 cout<<"-1\n"

using namespace std;

const int N = 555;
const int M = 2e5+100;
const int INF = 1e18;
const int mod = 998244353;
  
// int binpow (int a, int n) {
// 	if (n == 0)
// 		return 1;
// 	if (n % 2 == 1)
// 		return (binpow (a, n-1) * a)%mod;
// 	else {
// 		int b = binpow (a, n/2) % mod;
// 		return (b * b)%mod;
// 	}
// }

int n,m,k;
char a[N][N];
string s;
map<char,pair<int,int>> d;
bool ok;

void dfs(int v, int x, int y){
    if(x<=0 || y<=0 || x>n || y>m || a[x][y] == '#') return;
    if(v==k){
        ok = 1;
        return;
    }
    if(s[v] != '?'){
        dfs(v+1,x+d[s[v]].ff,y+d[s[v]].ss);
    }
    else{
        dfs(v+1,x+1,y);
        dfs(v+1,x-1,y);
        dfs(v+1,x,y+1);
        dfs(v+1,x,y-1);
    }
}

void solve(){
    cin>>n>>m>>k;
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            cin>>a[i][j];
        }
    }
    cin>>s;
    int ans = 0;
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            ok = 0;
            dfs(0,i,j);
            if(ok){
                ans++;
            }
        }
    }
    cout<<ans<<'\n';
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    d['N'].ff--;
    d['W'].ss--;
    d['S'].ff++;
    d['E'].ss++;
    int t = 1; 
    // cin>>t;
    //   cout<<"";
    for(int i = 1;i<=t;i++){
        solve();
        // cout<<'\n';
    }
}

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