#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include<bits/stdc++.h>
#include<math.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef pair<ll, ll> pl;
#define K first
#define V second
#define G(x) ll x; cin >> x;
#define GD(x) ld x; cin >> x;
#define GS(s) string s; cin >> s;
#define EX(x) { cout << x << '\n'; exit(0); }
#define A(a) (a).begin(), (a).end()
#define F(i, l, r) for (ll i = (l); i < r; ++i)
#define NN
#define M 1000000007 // 998244353
string grid[4010];
bool vis[4010][4010];
int main(){
// freopen("a.in", "r", stdin);
// freopen("a.out", "w", stdout);
ios_base::sync_with_stdio(false); cin.tie(0);
cout << fixed << setprecision(20);
G(h) G(w)
F(i, 0, h) cin >> grid[i];
ll dx[4] = {0, -1, 0, 1};
ll dy[4] = {1, 0, -1, 0};
vector<pl> q{pl{0, 0}}, nq;
char cur = grid[0][0]; // character we are currently looking at
ll iter = 0;
vis[0][0] = 1;
for (; q.size(); iter++, swap(q, nq), nq.clear(), cur = cur == 'R' ? 'F' : 'R') {
F(ha, 0, q.size()) {
const auto &[x, y] = q[ha];
F(k, 0, 4) {
ll ni = x + dx[k], nj = y + dy[k];
if (min(ni, nj) >= 0 and ni < h and nj < w and grid[ni][nj] != '.' and !vis[ni][nj]) {
vis[ni][nj] = 1;
if (grid[ni][nj] == cur) q.emplace_back(ni, nj);
else nq.emplace_back(ni, nj);
}
}
}
}
// F(i, 0, h) {
// F(j, 0, w) {
// cout << vis[i][j];
// }
// cout << endl;
// }
cout << iter << '\n';
}
Compilation message
tracks.cpp: In function 'int main()':
tracks.cpp:20:39: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | #define F(i, l, r) for (ll i = (l); i < r; ++i)
......
44 | F(ha, 0, q.size()) {
| ~~~~~~~~~~~~~~~
tracks.cpp:44:9: note: in expansion of macro 'F'
44 | F(ha, 0, q.size()) {
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
8 ms |
3548 KB |
Output isn't correct |
| 2 |
Correct |
0 ms |
604 KB |
Output is correct |
| 3 |
Correct |
1 ms |
604 KB |
Output is correct |
| 4 |
Runtime error |
5 ms |
5972 KB |
Execution killed with signal 11 |
| 5 |
Correct |
2 ms |
1932 KB |
Output is correct |
| 6 |
Correct |
0 ms |
584 KB |
Output is correct |
| 7 |
Correct |
1 ms |
604 KB |
Output is correct |
| 8 |
Correct |
1 ms |
860 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1628 KB |
Output is correct |
| 11 |
Runtime error |
5 ms |
3928 KB |
Execution killed with signal 11 |
| 12 |
Correct |
4 ms |
2292 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1716 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 15 |
Correct |
7 ms |
3164 KB |
Output is correct |
| 16 |
Incorrect |
7 ms |
3556 KB |
Output isn't correct |
| 17 |
Correct |
5 ms |
2900 KB |
Output is correct |
| 18 |
Runtime error |
5 ms |
6100 KB |
Execution killed with signal 11 |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
15704 KB |
Output is correct |
| 2 |
Incorrect |
26 ms |
8796 KB |
Output isn't correct |
| 3 |
Correct |
113 ms |
49792 KB |
Output is correct |
| 4 |
Correct |
37 ms |
15700 KB |
Output is correct |
| 5 |
Correct |
62 ms |
31060 KB |
Output is correct |
| 6 |
Runtime error |
42 ms |
53968 KB |
Execution killed with signal 11 |
| 7 |
Correct |
9 ms |
16220 KB |
Output is correct |
| 8 |
Correct |
7 ms |
15708 KB |
Output is correct |
| 9 |
Correct |
1 ms |
856 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
7 ms |
15964 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1116 KB |
Output is correct |
| 13 |
Incorrect |
26 ms |
8792 KB |
Output isn't correct |
| 14 |
Incorrect |
15 ms |
5976 KB |
Output isn't correct |
| 15 |
Correct |
8 ms |
6488 KB |
Output is correct |
| 16 |
Correct |
12 ms |
3672 KB |
Output is correct |
| 17 |
Correct |
73 ms |
17068 KB |
Output is correct |
| 18 |
Correct |
36 ms |
16464 KB |
Output is correct |
| 19 |
Correct |
37 ms |
15700 KB |
Output is correct |
| 20 |
Correct |
30 ms |
14424 KB |
Output is correct |
| 21 |
Correct |
90 ms |
32328 KB |
Output is correct |
| 22 |
Correct |
61 ms |
31016 KB |
Output is correct |
| 23 |
Correct |
145 ms |
26520 KB |
Output is correct |
| 24 |
Correct |
66 ms |
31664 KB |
Output is correct |
| 25 |
Correct |
181 ms |
49744 KB |
Output is correct |
| 26 |
Correct |
333 ms |
304308 KB |
Output is correct |
| 27 |
Runtime error |
598 ms |
499784 KB |
Execution killed with signal 11 |
| 28 |
Runtime error |
40 ms |
53964 KB |
Execution killed with signal 11 |
| 29 |
Runtime error |
45 ms |
53940 KB |
Execution killed with signal 11 |
| 30 |
Runtime error |
40 ms |
53192 KB |
Execution killed with signal 11 |
| 31 |
Runtime error |
29 ms |
39484 KB |
Execution killed with signal 11 |
| 32 |
Runtime error |
67 ms |
84100 KB |
Execution killed with signal 11 |
