#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 1.8e6 + 10;
const int MOD = 1e9 + 7;
//#define int long long
int rnd(int x, int y) { // random number generator
int u= uniform_int_distribution<int>(x, y)(rng); return u;
}
vector<int> adj[MAXN];
map<int, bool> active;
bool vis[MAXN];
int cnt[2];
void dfs(int node, int cur) {
cnt[cur]++;
vis[node] = 1;
for(int x: adj[node]) {
if(!vis[x]) dfs(x, 1 - cur);
}
}
void solve(int tc) {
int n, m;
cin >> n >> m;
char a[n+1][m+1];
for(int i=1; i<=n; i++) {
for(int j=1; j<=m; j++) {
cin >> a[i][j];
}
}
for(int i=1; i<=n; i++) {
for(int j=1; j<=m; j++) {
if(j+2 <= m && a[i][j] == 'R' && a[i][j+1] == 'G' && a[i][j+2] == 'W') {
int id = (i-1) * m + j;
active[id] = 1;
if(i+2 <= n && a[i+1][j] == 'G' && a[i+2][j] == 'W') {
int id2 = n*m + (i-1) * m + j;
adj[id].push_back(id2);
adj[id2].push_back(id);
}
if(i >= 2 && i+1 <= n && a[i-1][j+1] == 'R' && a[i+1][j+1] == 'W') {
int id2 = n*m + (i-2) * m + j+1;
adj[id].push_back(id2);
adj[id2].push_back(id);
}
if(i >= 3 && a[i-2][j+2] == 'R' && a[i-1][j+2] == 'G') {
int id2 = n*m + (i-3) * m + j+2;
adj[id].push_back(id2);
adj[id2].push_back(id);
}
}
if(i+2 <= n && a[i][j] == 'R' && a[i+1][j] == 'G' && a[i+2][j] == 'W') {
int id = n*m + (i-1) * m + j;
active[id] = 1;
}
}
}
int ans = 0;
for(auto x: active) {
if(!vis[x.first]) {
cnt[0] = cnt[1] = 0;
dfs(x.first, 0);
ans += max(cnt[0], cnt[1]);
}
}
cout << ans << "\n";
}
int32_t main(){
ios::sync_with_stdio(0); cin.tie(0);
int t = 1; //cin >> t;
for(int i=1; i<=t; i++) solve(i);
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
22 ms |
42572 KB |
Output is correct |
2 |
Correct |
23 ms |
42572 KB |
Output is correct |
3 |
Correct |
21 ms |
42448 KB |
Output is correct |
4 |
Correct |
23 ms |
42572 KB |
Output is correct |
5 |
Correct |
21 ms |
42512 KB |
Output is correct |
6 |
Correct |
22 ms |
42572 KB |
Output is correct |
7 |
Correct |
22 ms |
42700 KB |
Output is correct |
8 |
Correct |
21 ms |
42496 KB |
Output is correct |
9 |
Correct |
21 ms |
42720 KB |
Output is correct |
10 |
Correct |
24 ms |
42592 KB |
Output is correct |
11 |
Correct |
21 ms |
42520 KB |
Output is correct |
12 |
Correct |
23 ms |
42484 KB |
Output is correct |
13 |
Correct |
24 ms |
42596 KB |
Output is correct |
14 |
Correct |
22 ms |
42572 KB |
Output is correct |
15 |
Correct |
22 ms |
42596 KB |
Output is correct |
16 |
Correct |
24 ms |
42504 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
22 ms |
42572 KB |
Output is correct |
2 |
Correct |
23 ms |
42572 KB |
Output is correct |
3 |
Correct |
21 ms |
42448 KB |
Output is correct |
4 |
Correct |
23 ms |
42572 KB |
Output is correct |
5 |
Correct |
21 ms |
42512 KB |
Output is correct |
6 |
Correct |
22 ms |
42572 KB |
Output is correct |
7 |
Correct |
22 ms |
42700 KB |
Output is correct |
8 |
Correct |
21 ms |
42496 KB |
Output is correct |
9 |
Correct |
21 ms |
42720 KB |
Output is correct |
10 |
Correct |
24 ms |
42592 KB |
Output is correct |
11 |
Correct |
21 ms |
42520 KB |
Output is correct |
12 |
Correct |
23 ms |
42484 KB |
Output is correct |
13 |
Correct |
24 ms |
42596 KB |
Output is correct |
14 |
Correct |
22 ms |
42572 KB |
Output is correct |
15 |
Correct |
22 ms |
42596 KB |
Output is correct |
16 |
Correct |
24 ms |
42504 KB |
Output is correct |
17 |
Correct |
27 ms |
42544 KB |
Output is correct |
18 |
Correct |
22 ms |
42528 KB |
Output is correct |
19 |
Correct |
22 ms |
42524 KB |
Output is correct |
20 |
Correct |
22 ms |
42576 KB |
Output is correct |
21 |
Correct |
21 ms |
42572 KB |
Output is correct |
22 |
Correct |
21 ms |
42572 KB |
Output is correct |
23 |
Correct |
22 ms |
42508 KB |
Output is correct |
24 |
Correct |
24 ms |
42464 KB |
Output is correct |
25 |
Correct |
27 ms |
42584 KB |
Output is correct |
26 |
Correct |
25 ms |
42692 KB |
Output is correct |
27 |
Correct |
22 ms |
42572 KB |
Output is correct |
28 |
Correct |
23 ms |
42548 KB |
Output is correct |
29 |
Correct |
24 ms |
42572 KB |
Output is correct |
30 |
Correct |
22 ms |
42520 KB |
Output is correct |
31 |
Correct |
22 ms |
42480 KB |
Output is correct |
32 |
Correct |
24 ms |
42492 KB |
Output is correct |
33 |
Correct |
21 ms |
42600 KB |
Output is correct |
34 |
Incorrect |
21 ms |
42508 KB |
Output isn't correct |
35 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
22 ms |
42572 KB |
Output is correct |
2 |
Correct |
23 ms |
42572 KB |
Output is correct |
3 |
Correct |
21 ms |
42448 KB |
Output is correct |
4 |
Correct |
23 ms |
42572 KB |
Output is correct |
5 |
Correct |
21 ms |
42512 KB |
Output is correct |
6 |
Correct |
22 ms |
42572 KB |
Output is correct |
7 |
Correct |
22 ms |
42700 KB |
Output is correct |
8 |
Correct |
21 ms |
42496 KB |
Output is correct |
9 |
Correct |
21 ms |
42720 KB |
Output is correct |
10 |
Correct |
24 ms |
42592 KB |
Output is correct |
11 |
Correct |
21 ms |
42520 KB |
Output is correct |
12 |
Correct |
23 ms |
42484 KB |
Output is correct |
13 |
Correct |
24 ms |
42596 KB |
Output is correct |
14 |
Correct |
22 ms |
42572 KB |
Output is correct |
15 |
Correct |
22 ms |
42596 KB |
Output is correct |
16 |
Correct |
24 ms |
42504 KB |
Output is correct |
17 |
Correct |
27 ms |
42544 KB |
Output is correct |
18 |
Correct |
22 ms |
42528 KB |
Output is correct |
19 |
Correct |
22 ms |
42524 KB |
Output is correct |
20 |
Correct |
22 ms |
42576 KB |
Output is correct |
21 |
Correct |
21 ms |
42572 KB |
Output is correct |
22 |
Correct |
21 ms |
42572 KB |
Output is correct |
23 |
Correct |
22 ms |
42508 KB |
Output is correct |
24 |
Correct |
24 ms |
42464 KB |
Output is correct |
25 |
Correct |
27 ms |
42584 KB |
Output is correct |
26 |
Correct |
25 ms |
42692 KB |
Output is correct |
27 |
Correct |
22 ms |
42572 KB |
Output is correct |
28 |
Correct |
23 ms |
42548 KB |
Output is correct |
29 |
Correct |
24 ms |
42572 KB |
Output is correct |
30 |
Correct |
22 ms |
42520 KB |
Output is correct |
31 |
Correct |
22 ms |
42480 KB |
Output is correct |
32 |
Correct |
24 ms |
42492 KB |
Output is correct |
33 |
Correct |
21 ms |
42600 KB |
Output is correct |
34 |
Incorrect |
21 ms |
42508 KB |
Output isn't correct |
35 |
Halted |
0 ms |
0 KB |
- |