#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 3e3 + 12, MOD = 998244353;
char a[N][N];
int n, m, res = 0, res1 = 0, v[N][N], it = 1, h[N][N], dp[N * N];
vector<int> g[N * N];
void add(int x, int y) {
g[x].push_back(y);
g[y].push_back(x);
}
bool vis[N * N];
void dfs(int v, int pr = -1) {
vis[v] = 1;
dp[v][1] = 1;
for(int to:g[v]) {
if(to == pr || vis[to]) continue;
dfs(to, v);
dp[v][0] += max(dp[to][0], dp[to][1]);
dp[v][1] += dp[to][0];
}
}
void test() {
cin >> n >> m;
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(a[i][j] == 'G' && a[i][j - 1] == 'R' && a[i][j + 1] == 'W') {
h[i][j - 1] = it++;
}
if(a[i][j] == 'G' && a[i - 1][j] == 'R' && a[i + 1][j] == 'W') {
v[i - 1][j] = it++;
}
}
}
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
if(a[i][j] == 'G' && a[i][j - 1] == 'R' && a[i][j + 1] == 'W') {
if(v[i][j - 1]) {
add(v[i][j - 1], h[i][j - 1]);
}
if(v[i - 1][j]) {
add(v[i - 1][j], h[i][j - 1]);
}
if(v[i - 2][j + 1]) {
add(v[i - 2][j + 1], h[i][j - 1]);
}
}
if(a[i][j] == 'G' && a[i - 1][j] == 'R' && a[i + 1][j] == 'W') {
if(h[i - 1][j]) {
add(v[i - 1][j], h[i - 1][j]);
}
if(h[i][j - 1]) {
add(v[i - 1][j], h[i][j - 1]);
}
if(h[i + 1][j - 2]) {
add(v[i - 1][j], h[i + 1][j - 2]);
}
}
}
}
for(int i = 1; i < it; i++) {
sort(g[i].begin(), g[i].end());
g[i].resize(unique(g[i].begin(), g[i].end()) - g[i].begin());
}
for(int i = 1; i < it; i++) {
if(!vis[i]) {
dfs(i);
res += max(dp[i][0], dp[i][1]);
}
}
cout << res << '\n';
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
int t = 1;
// cin >> t;
while(t--)
test();
return 0;
}
Compilation message
dango_maker.cpp: In function 'void dfs(int, int)':
dango_maker.cpp:19:10: error: invalid types 'int[int]' for array subscript
19 | dp[v][1] = 1;
| ^
dango_maker.cpp:23:14: error: invalid types 'int[int]' for array subscript
23 | dp[v][0] += max(dp[to][0], dp[to][1]);
| ^
dango_maker.cpp:23:31: error: invalid types 'int[int]' for array subscript
23 | dp[v][0] += max(dp[to][0], dp[to][1]);
| ^
dango_maker.cpp:23:42: error: invalid types 'int[int]' for array subscript
23 | dp[v][0] += max(dp[to][0], dp[to][1]);
| ^
dango_maker.cpp:24:14: error: invalid types 'int[int]' for array subscript
24 | dp[v][1] += dp[to][0];
| ^
dango_maker.cpp:24:27: error: invalid types 'int[int]' for array subscript
24 | dp[v][1] += dp[to][0];
| ^
dango_maker.cpp: In function 'void test()':
dango_maker.cpp:77:29: error: invalid types 'int[int]' for array subscript
77 | res += max(dp[i][0], dp[i][1]);
| ^
dango_maker.cpp:77:39: error: invalid types 'int[int]' for array subscript
77 | res += max(dp[i][0], dp[i][1]);
| ^
