Submission #1282628

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282628		quan606303	Nautilus (BOI19_nautilus)	C++20	0 / 100	1 ms	332 KiB

nautilus

/*
 * @Author: RMQuan 
 * @Date: 2025-09-08 15:49:18 
 * @Last Modified by: RMQuan
 * @Last Modified time: 2025-10-23 22:21:18
 */
/*idea : 



*/
#include <bits/stdc++.h>
bool M1;
#define int long long
#define ll long long
#define INTMAX INT_MAX
#define INTMIN INT_MIN
#define LONGMAX LLONG_MAX
#define LONGMIN LLONG_MIN
#define fi first
#define se second
#define memfull(a,b) memset(a,b,sizeof(a));
#define endl '\n'
#define file(a) freopen(a".inp","r",stdin); freopen(a".out","w",stdout);
using namespace std;
const int MOD=1e9+7;
const int maxn=505;
bitset<maxn> a[maxn];
bitset<maxn> dp[2][maxn];
int n,m,k;
string s;
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    file("TEST");
    cin>>n>>m>>k;
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=m;j++)
        {
            char x;
            cin>>x;
            a[i][j]=(x=='.'?1:0);
        }
    }
    cin>>s;
    s="$"+s;
    for (int i=1;i<=n;i++)dp[0][i]=a[i];
   for (int i=1;i<=k;i++)
  for (int j=1;j<=n;j++)
  {
      dp[i&1][j].reset();
      if ((s[i]=='N'||s[i]=='?') && j+1<=n) dp[i&1][j] |= dp[(i-1)&1][j+1];
      if ((s[i]=='S'||s[i]=='?') && j-1>=1) dp[i&1][j] |= dp[(i-1)&1][j-1];
      if ((s[i]=='E'||s[i]=='?')) dp[i&1][j] |= (dp[(i-1)&1][j] << 1);
      if ((s[i]=='W'||s[i]=='?')) dp[i&1][j] |= (dp[(i-1)&1][j] >> 1);
      dp[i&1][j] &= a[j];
  }

    int ans=0;
    for (int i=1;i<=n;i++)ans+=dp[k&1][i].count();
    cout<<ans;
    bool M2;
    cerr<<"-------------------------------------------------"<<endl;
    cerr<<"Time : "<<clock()<<" ms"<<endl;
    cerr<<"Memory : "<<abs(&M2-&M1)/1024/1024<<" MB"<<endl;
    cerr<<"-------------------------------------------------"<<endl;
    return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'int32_t main()':
nautilus.cpp:24:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 | #define file(a) freopen(a".inp","r",stdin); freopen(a".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~
nautilus.cpp:37:5: note: in expansion of macro 'file'
   37 |     file("TEST");
      |     ^~~~
nautilus.cpp:24:52: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 | #define file(a) freopen(a".inp","r",stdin); freopen(a".out","w",stdout);
      |                                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~
nautilus.cpp:37:5: note: in expansion of macro 'file'
   37 |     file("TEST");
      |     ^~~~

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