Submission #1215717

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215717		Malix	Nautilus (BOI19_nautilus)	C++20	66 / 100	1095 ms	1096 KiB

nautilus

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> ti;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
#define all(x) x.begin(),x.end()

ll INF=1000000000000000010;
int inf=1e9+10;
ll M=1e9+7;

bool a[2][500][500],b[500][500];

int main() {   
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,m,k;cin>>n>>m>>k;
    memset(a,0,sizeof(a));
    memset(b,0,sizeof(b));
    REP(i,0,n)REP(j,0,m){
        char c;cin>>c;
        a[0][i][j]=(c=='.');
        b[i][j]=(c=='.');
    }
    string s;cin>>s;
    vector<pi> loc={{1,0},{-1,0},{0,1},{0,-1}};
    REP(i,0,k){
        if(s[i]=='?')REP(x,0,n)REP(y,0,m)if(a[0][x][y])for(auto [u,v]:loc)if(x+u>=0&&x+u<n&&y+v>=0&&y+v<m&&b[x+u][y+v])a[1][x+u][y+v]=1;
        if(s[i]!='?'){
            int pos=0;
            if(s[i]=='N')pos=1;
            else if(s[i]=='E')pos=2;
            else if(s[i]=='W')pos=3;
            auto [u,v]=loc[pos];
            REP(x,0,n)REP(y,0,m)if(a[0][x][y])if(x+u>=0&&x+u<n&&y+v>=0&&y+v<m&&b[x+u][y+v])a[1][x+u][y+v]=1;
        }
        REP(x,0,n)REP(y,0,m)a[0][x][y]=a[1][x][y];
        memset(a[1],0,sizeof(a[1]));
    }
    int ans=0;
    REP(i,0,n)REP(j,0,m)if(a[0][i][j])ans++;
    cout<<ans;
}

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