/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
const int N = 1e7+100, M = 1e5+10, K = 20;
int n, m;
string s[N];
vector<bool> g[N][2];
vector<bool> v(N);
vector<array<bool, 2>> vis(N);
int arr[2][3] = {
{
0,
m-1,
2*m-2
},
{
0,
-m+1,
-2*m+2
}
};
pair<int, int> dfs(int x, int p){
if(!v[x]) return {0, 0};
pair<int, int> ans = {1, 0};
vis[x][p] = 1;
for(auto y: g[x][p]){
pair<int, int> u = {arr[p][y], 1-p};
if(vis[u.first][u.second]) continue;
auto dp = dfs(u.first, u.second);
ans.first += dp.second;
ans.second += max(dp.first, dp.second);
}
return ans;
}
void solve(){
cin >> n >> m;
for(int i = 0; i < n; ++i) cin >> s[i];
for(int i = 0; i < n; ++i){
for(int j = 0; j < m; ++j){
g[i*m+j][0].resize(3);
g[i*m+j][1].resize(3);
if(i < n - 2){
int x = i*m+j;
if(s[i][j] == 'R' && s[i+1][j] == 'G' && s[i+2][j] == 'W'){
if(v[x]) g[x][0].pb(0), g[x][1].pb(0);
if(v[x+m]) g[x][0].pb(1), g[x+m-1][1].pb(1);
if(v[x+m+m]) g[x][0].pb(2), g[x+2*m-2][1].pb(2);
v[x] = v[x+m] = v[x+m+m] = 1;
}
}
if(j < m-2){
int x = i*m+j;
if(s[i][j] == 'R' && s[i][j+1] == 'G' && s[i][j+2] == 'W'){
if(v[x]) g[x][1].pb(0), g[x][0].pb(0);
if(v[x+1]) g[x][1].pb(1), g[x+1-m][0].pb(1);
if(v[x+2]) g[x][1].pb(2), g[x+2-2*m][0].pb(2);
v[x] = v[x+1] = v[x+2] = 1;
}
}
}
}
int ans = 0;
for(int i = 0; i < n; ++i){
for(int j = 0; j < m; ++j){
if(s[i][j] != 'R') continue;
if(!vis[i*m+j][0] || !vis[i*m+j][1]){
int t = 0;
if(!vis[i*m+j][1])
t = 1;
auto dp = dfs(i*m+j, t);
ans += max(dp.first, dp.second);
}
}
}
cout << ans;
}
int main(){
cin.tie(0); ios::sync_with_stdio(0);
int T = 1, aa;
// cin >> T;aa=T;
while(T--){
// cout << "Case #" << aa-T << ": ";
solve();
cout << '\n';
}
return 0;
}
Compilation message
dango_maker.cpp: In function 'int main()':
dango_maker.cpp:91:14: warning: unused variable 'aa' [-Wunused-variable]
91 | int T = 1, aa;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
93 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
93 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
93 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
