Submission #1263523

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263523		Bui_Quoc_Cuong	Nautilus (BOI19_nautilus)	C++20	66 / 100	1100 ms	127476 KiB

nautilus

#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=a;i<=(int)b;i++)
#define FORD(i,a,b) for(int i=a;i>=(int)b;i--)
#define fi first
#define se second
#define pb push_back
#define ALL(A) A.begin(), A.end()
#define BIT(mask,i) ((mask>>(i))&1)
#define ll long long
using namespace std;
template <class A, class B> bool maximize(A &a, const B b) {if(a<b){a = b;return 1;} return 0;}
template <class A, class B> bool minimize(A &a, const B b) {if(a>b){a = b;return 1;} return 0;}
const int maxn = 5005;
int n, m, lenS;
string s;
char a[maxn][maxn];
void init()
{
    cin >> n >> m >> lenS;
    FOR(i, 1, n) FOR(j, 1, m)
    {
        cin >> a[i][j];
    }
    cin >> s; s = '*' + s;
}
bool dp[505][505][505];
const int dx[] = {- 1, 0, 1, 0};
const int dy[] = {0, 1, 0, - 1};
int get(char x)
{
    if(x == 'N') return 0;
    if(x == 'E') return 1;
    if(x == 'S') return 2;
    return 3;
}
void process()
{
    FOR(i, 1, n) FOR(j, 1, m)
    {
        if(a[i][j] == '.') dp[i][j][0] = 1;
    }
    FOR(turn, 1, lenS) FOR(i, 1, n) FOR(j, 1, m)
    {
        if(a[i][j] == '#') continue;
        if(s[turn] == 'N' || s[turn] == '?')
        {
            dp[i][j][turn]|= dp[i + 1][j][turn - 1];
        }
        if(s[turn] == 'E' || s[turn] == '?')
        {
            dp[i][j][turn] |= dp[i][j - 1][turn - 1];
        }
        if(s[turn] == 'S' || s[turn] == '?')
        {
            dp[i][j][turn] |= dp[i - 1][j][turn - 1];
        }
        if(s[turn] == 'W' || s[turn] == '?')
        {
            dp[i][j][turn] |= dp[i][j + 1][turn - 1];
        }
    }
    int ans = 0;
    FOR(i, 1, n) FOR(j, 1, m) if(dp[i][j][lenS])
    {
      ///  cout << i << " " << j << "\n";
        ans++;
    }
    cout << ans;
}
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #define Hori "kieuoanh"
    if(fopen(Hori".inp", "r"))
    {
        freopen(Hori".inp", "r", stdin);
        freopen(Hori".out", "w", stdout);
    }
    init();
    process();
    return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen(Hori".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen(Hori".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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