| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 703569 |
2023-02-27T17:02:10 Z |
bebra |
Nautilus (BOI19_nautilus) |
C++17 |
|
241 ms |
159400 KB |
#include <bits/stdc++.h>
using namespace std;
#define dbg(x) cerr << #x << ": " << x << endl;
const int MAX_N = 500 + 5;
const int MAX_M = 5000 + 5;
string a[MAX_N];
vector<pair<int, int>> delta = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
bitset<MAX_N> dp[MAX_M][MAX_N];
bitset<MAX_N> mask[MAX_N];
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n, m, t;
cin >> n >> m >> t;
for (int i = 0; i < n; ++i) {
cin >> a[i];
for (int j = 0; j < m; ++j) {
if (a[i][j] == '.') {
mask[i].set(j);
}
}
}
string s;
cin >> s;
reverse(s.begin(), s.end());
vector<vector<pair<int, int>>> dir(t);
for (int i = 0; i < t; ++i) {
auto c = s[i];
if (c == 'N') {
dir[i] = {delta[0]};
} else if (c == 'S') {
dir[i] = {delta[1]};
} else if (c == 'W') {
dir[i] = {delta[2]};
} else if (c == 'E') {
dir[i] = {delta[3]};
} else {
dir[i] = delta;
}
}
for (int i = 0; i < n; ++i) {
dp[t][i] = mask[i];
}
// reverse the operations and check if there exists at least one starting position
for (int k = t - 1; k >= 0; --k) {
for (const auto& [di, dj] : dir[k]) {
for (int i = 0; i < n; ++i) {
if (i == 0 && di == -1) continue;
if (dj >= 0) {
dp[k][i] |= (dp[k + 1][i + di] >> abs(dj)) & mask[i];
} else {
dp[k][i] |= (dp[k + 1][i + di] << abs(dj)) & mask[i];
}
}
}
}
int ans = 0;
for (int i = 0; i < n; ++i) {
for (int j = 0; j < m; ++j) {
ans += dp[0][i].test(j);
}
}
cout << ans << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1380 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1380 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 22 |
Correct |
146 ms |
159048 KB |
Output is correct |
| 23 |
Correct |
160 ms |
159324 KB |
Output is correct |
| 24 |
Correct |
143 ms |
159280 KB |
Output is correct |
| 25 |
Correct |
138 ms |
159220 KB |
Output is correct |
| 26 |
Correct |
142 ms |
159316 KB |
Output is correct |
| 27 |
Correct |
188 ms |
159308 KB |
Output is correct |
| 28 |
Correct |
191 ms |
159236 KB |
Output is correct |
| 29 |
Correct |
193 ms |
159312 KB |
Output is correct |
| 30 |
Correct |
193 ms |
159280 KB |
Output is correct |
| 31 |
Correct |
187 ms |
159360 KB |
Output is correct |
| 32 |
Correct |
227 ms |
159372 KB |
Output is correct |
| 33 |
Correct |
228 ms |
159336 KB |
Output is correct |
| 34 |
Correct |
241 ms |
159328 KB |
Output is correct |
| 35 |
Correct |
233 ms |
159400 KB |
Output is correct |
| 36 |
Correct |
226 ms |
159352 KB |
Output is correct |
