Submission #900602

#	Time	Username	Problem	Language	Result	Execution time	Memory
900602		mraron	Nautilus (BOI19_nautilus)	C++14	100 / 100	165 ms	157520 KiB

nautilus

#include<iostream>
#include<vector>
#include<map>
#include<set>
#include<cassert>
#include<unordered_map>
#include<unordered_set>
#include<functional>
#include<queue>
#include<stack>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<sstream>
#include<iomanip>
#include<cstdio>
#include<cstdlib>
#include<numeric>
#include<random>
#include<chrono>
#include<bitset>
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;

#define all(x) (x).begin(), (x).end()
#define pb push_back
#define eb emplace_back
#define xx first
#define yy second
#define sz(x) (int)(x).size()
#define gc getchar
#define IO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define mp make_pair
#define ins insert

#ifndef ONLINE_JUDGE
#  define LOG(x) (cerr << #x << " = " << (x) << endl)
#else
#  define LOG(x) ((void)0)
#endif

using ll = long long;
using ull = unsigned long long ;
using ld = long double ;
using str = string;
//using ordered_set=tree<pair<int,int>, null_type, less<pair<int,int>>, rb_tree_tag, tree_order_statistics_node_update>;

const double PI=acos(-1);
const ll INF = 1LL<<62;
const ll MINF = -(1LL<<62);

template<typename T> T getint() {
    T val=0;
    char c;
    
    bool neg=false;
    while((c=gc()) && !(c>='0' && c<='9')) {
        neg|=c=='-';
    }

    do {
        val=(val*10)+c-'0';
    } while((c=gc()) && (c>='0' && c<='9'));

    return val*(neg?-1:1);
}

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); uniform_int_distribution<int>(0, n-1)(rng)


int n,m,k;
string t[501];
bitset<501> dp[501][5001];

int main() {
    IO;
    cin>>n>>m>>k;
    for(int i=0;i<n;++i) cin>>t[i];
    
    for(int i=0;i<n;++i) {
        for(int j=0;j<m;++j) {
            if(t[i][j]=='.') dp[i][0][j]=1;
        }
    }
    string s;
    cin>>s;
    for(int i=1;i<=sz(s);++i) {
       bool q=s[i-1]=='?';
       if(q||s[i-1]=='S')
            for(int r=1;r<n;++r) {
                dp[r][i]|=dp[r-1][i-1];
            }
       if(q||s[i-1]=='N')
            for(int r=0;r+1<n;++r) {
                dp[r][i]|=dp[r+1][i-1];
            }
       if(q||s[i-1]=='W')
            for(int r=0;r<n;++r) {
                dp[r][i]|=dp[r][i-1]>>1;
            }
       if(q||s[i-1]=='E') 
            for(int r=0;r<n;++r) {
                dp[r][i]|=dp[r][i-1]<<1;
            }
        for(int r=0;r<n;++r) {
            dp[r][i]&=dp[r][0];
        }
        //~ for(int r=0;r<n;++r){
            //~ for(int j=0;j<m;++j) {
                //~ cerr<<dp[r][i][j]<<" ";
            //~ }cerr<<"\n";
        //~ }
    }
    
    int ans=0;
    for(int i=0;i<n;++i) {
        ans+=dp[i][sz(s)].count();
    }
    cout<<ans<<"\n";
    
    return 0;
}

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