#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
void Solve()
{
int n, m;
cin >> n >> m;
vector<string> g(n);
for (auto &x : g) cin >> x;
vector<vector<int>> can(n, vector<int>(m, 0));
for (int i = 0; i < n; i++){
for (int j = 0; j < m; j++){
if (g[i][j] != 'G') continue;
if (i != 0 && i != n - 1 && g[i - 1][j] == 'R' && g[i + 1][j] == 'W')
can[i][j]++;
if (j != 0 && j != m - 1 && g[i][j - 1] == 'R' && g[i][j + 1] == 'W')
can[i][j] += 2;
}
}
int last = 0;
for (int s = 1; s <= n + m - 2; s++){
vector <vector<int>> dp(m + 1, vector<int>(3, 0));
bool first = true;
for (int i = 0; i < min(s + 1, n); i++){
int j = s - i;
if (j >= m) continue;
if (first){
first = false;
dp[j][0] = last;
if (can[i][j] % 2) dp[j][1] = last + 1;
if (can[i][j] >= 2) dp[j][2] = last + 1;
} else {
for (int l1 = 0; l1 <= 2; l1++){
for (int l2 = 0; l2 <= 2; l2++){
if (l1 != 0 && l2 != 0 && l1 != l2) continue;
if (l2 == 0 || (can[i][j] >> (l2 - 1) & 1))
dp[j][l2] = max(dp[j][l2], dp[j + 1][l1] + (l2 != 0));
}
}
}
last = max(dp[j][0], max(dp[j][1], dp[j][2]));
}
}
cout << last << "\n";
}
int32_t main()
{
auto begin = std::chrono::high_resolution_clock::now();
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
// cin >> t;
for(int i = 1; i <= t; i++)
{
//cout << "Case #" << i << ": ";
Solve();
}
auto end = std::chrono::high_resolution_clock::now();
auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
328 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
1 ms |
324 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
328 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
1 ms |
324 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
320 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
0 ms |
212 KB |
Output is correct |
| 23 |
Correct |
0 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
320 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
212 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
1 ms |
212 KB |
Output is correct |
| 31 |
Correct |
1 ms |
212 KB |
Output is correct |
| 32 |
Correct |
1 ms |
212 KB |
Output is correct |
| 33 |
Correct |
1 ms |
332 KB |
Output is correct |
| 34 |
Correct |
1 ms |
212 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
324 KB |
Output is correct |
| 37 |
Correct |
1 ms |
212 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
212 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Correct |
1 ms |
320 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
212 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
1 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
212 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
0 ms |
212 KB |
Output is correct |
| 49 |
Correct |
1 ms |
212 KB |
Output is correct |
| 50 |
Correct |
0 ms |
212 KB |
Output is correct |
| 51 |
Correct |
1 ms |
212 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
328 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
1 ms |
324 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
320 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
0 ms |
212 KB |
Output is correct |
| 23 |
Correct |
0 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
320 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
212 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
1 ms |
212 KB |
Output is correct |
| 31 |
Correct |
1 ms |
212 KB |
Output is correct |
| 32 |
Correct |
1 ms |
212 KB |
Output is correct |
| 33 |
Correct |
1 ms |
332 KB |
Output is correct |
| 34 |
Correct |
1 ms |
212 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
324 KB |
Output is correct |
| 37 |
Correct |
1 ms |
212 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
212 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Correct |
1 ms |
320 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
212 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
1 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
212 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
0 ms |
212 KB |
Output is correct |
| 49 |
Correct |
1 ms |
212 KB |
Output is correct |
| 50 |
Correct |
0 ms |
212 KB |
Output is correct |
| 51 |
Correct |
1 ms |
212 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| 54 |
Correct |
296 ms |
516 KB |
Output is correct |
| 55 |
Correct |
4 ms |
468 KB |
Output is correct |
| 56 |
Correct |
306 ms |
828 KB |
Output is correct |
| 57 |
Correct |
3 ms |
596 KB |
Output is correct |
| 58 |
Correct |
116 ms |
10276 KB |
Output is correct |
| 59 |
Correct |
991 ms |
89524 KB |
Output is correct |
| 60 |
Correct |
1024 ms |
89636 KB |
Output is correct |
| 61 |
Correct |
1051 ms |
89744 KB |
Output is correct |
| 62 |
Correct |
257 ms |
532 KB |
Output is correct |
| 63 |
Correct |
901 ms |
86644 KB |
Output is correct |
| 64 |
Correct |
961 ms |
89640 KB |
Output is correct |
| 65 |
Correct |
959 ms |
89640 KB |
Output is correct |
| 66 |
Correct |
927 ms |
89640 KB |
Output is correct |
| 67 |
Correct |
909 ms |
89640 KB |
Output is correct |
| 68 |
Correct |
945 ms |
89636 KB |
Output is correct |
| 69 |
Correct |
1041 ms |
89640 KB |
Output is correct |
| 70 |
Correct |
112 ms |
10296 KB |
Output is correct |
| 71 |
Correct |
108 ms |
10300 KB |
Output is correct |
| 72 |
Correct |
109 ms |
10236 KB |
Output is correct |
| 73 |
Correct |
104 ms |
10304 KB |
Output is correct |
| 74 |
Correct |
109 ms |
10296 KB |
Output is correct |
| 75 |
Correct |
104 ms |
10296 KB |
Output is correct |
| 76 |
Correct |
92 ms |
10296 KB |
Output is correct |
| 77 |
Correct |
100 ms |
10292 KB |
Output is correct |
| 78 |
Correct |
96 ms |
10300 KB |
Output is correct |
| 79 |
Correct |
103 ms |
10296 KB |
Output is correct |
| 80 |
Correct |
97 ms |
10312 KB |
Output is correct |
| 81 |
Correct |
96 ms |
10296 KB |
Output is correct |
| 82 |
Correct |
89 ms |
10300 KB |
Output is correct |
| 83 |
Correct |
106 ms |
10300 KB |
Output is correct |
| 84 |
Correct |
120 ms |
10300 KB |
Output is correct |
| 85 |
Correct |
123 ms |
10196 KB |
Output is correct |
| 86 |
Correct |
90 ms |
10296 KB |
Output is correct |
| 87 |
Correct |
95 ms |
10296 KB |
Output is correct |
| 88 |
Correct |
130 ms |
10296 KB |
Output is correct |
| 89 |
Correct |
102 ms |
10304 KB |
Output is correct |
| 90 |
Correct |
108 ms |
10312 KB |
Output is correct |
