Submission #493603

#	Time	Username	Problem	Language	Result	Execution time	Memory
493603		Fysty	Nautilus (BOI19_nautilus)	C++14	100 / 100	191 ms	964 KiB

nautilus

#include <bits/stdc++.h>
#include <random>
#include <chrono>
using namespace std;
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<double,double> pdd;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

template<typename T> void _do(T x){cerr<<x<<"\n";}
template<typename T,typename ...U> void _do(T x,U ...y){cerr<<x<<", ";_do(y...);}
#define dbg(...) cerr<<#__VA_ARGS__<<" = ";_do(__VA_ARGS__);

const int MOD1=1e9+7;
const int MOD2=998244353;
const ll INF=3e18;
const ld PI=3.14159265358979323846;
ll gcd(ll a,ll b){if(b==0) return a; return gcd(b,a%b);}
ll fpow(ll a,ll b,ll m)
{
    if(!b) return 1;
    ll ans=fpow(a*a%m,b/2,m);
    return (b%2?ans*a%m:ans);
}
ll inv(ll a,ll m) {return fpow(a,m-2,m);}

#define MottoHayaku ios::sync_with_stdio(false);cin.tie(0);
//#define int ll
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define repk(i,m,n) for(int i=m;i<n;i++)
#define F first
#define S second
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define uni(c) c.resize(distance(c.begin(),unique(c.begin(),c.end())))
#define unisort(c) sort(c.begin(),c.end()),uni(c)
bitset<251000> can,st;
signed main()
{
    MottoHayaku
    ll n,m,k;
    cin>>n>>m>>k;
    rep(i,n)
    {
        rep1(j,m)
        {
            char c;
            cin>>c;
            if(c=='.') st[i*(m+2)+j]=1;
        }
    }
    string s;
    cin>>s;
    can=st;
    rep(i,s.size())
    {
        if(s[i]=='W') can=st&(can>>1);
        else if(s[i]=='E') can=st&(can<<1);
        else if(s[i]=='N') can=st&(can>>(m+2));
        else if(s[i]=='S') can=st&(can<<(m+2));
        else can=st&((can>>1)|(can<<1)|(can>>(m+2))|(can<<(m+2)));
    }
    cout<<can.count();
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:35:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 | #define rep(i,n) for(int i=0;i<n;i++)
......
   63 |     rep(i,s.size())
      |         ~~~~~~~~~~             
nautilus.cpp:63:5: note: in expansion of macro 'rep'
   63 |     rep(i,s.size())
      |     ^~~

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