Submission #1111317

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111317		hainam2k9	Nautilus (BOI19_nautilus)	C++17	100 / 100	144 ms	158888 KiB

nautilus

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
using namespace std;
const int MOD = 1e9+7, MAXN = 1e5+5;
const string NAME = "";
int n,m,k,rs=0;
bitset<505> dp[5005][505],mask[505];
char c;
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n >> m >> k;
    for(int i = 1; i<=n; ++i)
        for(int j = 1; j<=m; ++j){
            cin >> c;
            if(c=='.') dp[0][i][j]=1, mask[i][j]=1;
        }
    for(int i = 1; i<=k; ++i){
        cin >> c;
        for(int j = 1; j<=n; ++j){
            if(c=='N'||c=='?') dp[i][j]|=dp[i-1][j+1];
            if(c=='S'||c=='?') dp[i][j]|=dp[i-1][j-1];
            if(c=='W'||c=='?') dp[i][j]|=dp[i-1][j]>>1;
            if(c=='E'||c=='?') dp[i][j]|=dp[i-1][j]<<1;
            dp[i][j]&=mask[j];
        }
    }
    for(int i = 1; i<=n; ++i) rs+=dp[k][i].count();
    cout << rs;
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:27:45: note: in expansion of macro 'fo'
   27 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
nautilus.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:27:45: note: in expansion of macro 'fo'
   27 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

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