Submission #496344

#	Time	Username	Problem	Language	Result	Execution time	Memory
496344		kingline	Nautilus (BOI19_nautilus)	C++17	66 / 100	26 ms	1424 KiB

nautilus

/*#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")*/
#include <bits/stdc++.h>
#define file(data) freopen(data".in", "r", stdin); freopen(data".out", "w", stdout);
#define pb push_back
#define all(data) data.begin(), data.end()
#define endl '\n'
#define ll long long
//#define int long long
#define pii pair < int, int >

using namespace std;

const int N = 2e5 + 5;

int n, m, k;
string s;
char c[105][105];
bool used[105][105][105], can[105][105];

void dfs(int x, int y, int pos) {
    if(min(x, y) == 0 || y > m || x > n) return;
    if(c[x][y] == '#') return;
    if(used[x][y][pos]) return;
    used[x][y][pos] = 1;
    if(pos == k) {
        can[x][y] = 1;
        return;
    }
    if(s[pos] == '?') {
        dfs(x + 1, y, pos + 1);
        dfs(x - 1, y, pos + 1);
        dfs(x, y + 1, pos + 1);
        dfs(x, y - 1, pos + 1);
    }
    if(s[pos] == 'W') {
        dfs(x, y - 1, pos + 1);
    } else if(s[pos] == 'E') {
        dfs(x, y + 1, pos + 1);
    } else if(s[pos] == 'N') {
        dfs(x - 1, y, pos + 1);
    } else if(s[pos] == 'S') {
        dfs(x + 1, y, pos + 1);
    }
}

main() {
    //file("pieaters");
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m >> k;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            cin >> c[i][j];
        }
    }
    cin >> s;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            dfs(i, j, 0);
        }
    }
    int ans = 0;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            if(can[i][j]) {
                ++ans;
            }
        }
    }
    cout << ans;
}

Compilation message (stderr)

nautilus.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   50 | main() {
      | ^~~~

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