Submission #565124

#	Time	Username	Problem	Language	Result	Execution time	Memory
565124		zaneyu	Nautilus (BOI19_nautilus)	C++14	0 / 100	2 ms	212 KiB

nautilus

/*input
5 9 7
...##....
..#.##..#
..#....##
.##...#..
....#....
WS?EE??
*/
#include<bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<long long,null_type,less_equal<long long>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
//order_of_key #of elements less than x
// find_by_order kth element
using ll=long long;
using ld=long double;
using pii=pair<int,int>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()),c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
const ll maxn=1e6+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=998244353;
const ld PI=acos(-1);
const ld eps=1e-6;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
template<typename T1,typename T2>
ostream& operator<<(ostream& out,pair<T1,T2> P){
    out<<P.f<<' '<<P.s;
    return out;
}
template<typename T>
ostream& operator<<(ostream& out,vector<T> V){
    REP(i,sz(V)) out<<V[i]<<((i!=sz(V)-1)?"\n":"");
    return out;
}
ll mult(ll a,ll b){
    return a*b%MOD;
}
ll mypow(ll a,ll b){
    a%=MOD;
    if(a==0) return 0;
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=(res*a)%MOD;
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
bitset<505> bs[505],ok[505],nbs[505];
int main(){
    int r,c,q;
    cin>>r>>c>>q;
    REP(i,r) REP(j,c){
        char x;
        cin>>x;
        if(x=='.') bs[i][j]=ok[i][j]=1;
    }
    while(q--){
        char x;
        cin>>x;
        if(x=='N'){
            bs[r-1].reset();
            REP(i,r-1) bs[i]=(bs[i+1]&ok[i]);
        }
        if(x=='S'){
            for(int i=r-1;i>=1;i--) bs[i]=(bs[i-1]&ok[i]);
            bs[0].reset();
        }
        if(x=='E'){
            REP(i,r) bs[i]=((bs[i]<<1)&ok[i]);
        }
        if(x=='W'){
            REP(i,r) bs[i]=((bs[i]>>1)&ok[i]);
        }
        if(x=='?'){
            REP(i,r){
                nbs[i].reset();
                if(i) nbs[i]|=bs[i-1];
                if(i<r-1) nbs[i]|=bs[i+1];
                nbs[i]|=(bs[i]<<1);
                nbs[i]|=(bs[i]>>1);
                nbs[i]&=ok[i];
            }
            REP(i,r) bs[i]=nbs[i];
        }
    }
    int ans=0;
    REP(i,r) REP(j,c) ans+=bs[i][j];
    cout<<ans<<'\n';
} 

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