#include <bits/stdc++.h>
using namespace std;
#define fo(i,s,t) for(int i = s; i <= t; ++ i)
#define fd(i,s,t) for(int i = s; i >= t; -- i)
#define bf(i,s) for(int i = head[s]; i; i = e[i].next)
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
#define VI vector<int>
#define sf scanf
#define pf printf
#define fp freopen
#define SZ(x) ((int)(x).size())
#ifdef MPS
#define D(x...) printf(x)
#else
#define D(x...)
#endif
typedef long long ll;
typedef double db;
typedef unsigned long long ull;
const int inf = 1<<30;
const ll INF = 1ll<<60;
const db Inf = 1e20;
const db eps = 1e-9;
void gmax(int &a,int b){a = (a > b ? a : b);}
void gmin(int &a,int b){a = (a < b ? a : b);}
const int maxn = 2001;
int n, m;
int b[maxn*maxn*2], s0, s1;
VI t[maxn][maxn];
char a[maxn][maxn];
VI adj[maxn*maxn*2];
void link(int u, int v) {adj[u].pb(v);}
bool color(int x, int c=0)
{
b[x] = c;
if(c == 0) s0 ++; else s1 ++;
for(auto p : adj[x])
if(b[p] == c) return false;
else if(b[p] == -1) color(p, c^1);
return true;
}
int p(int x, int y)
{
return (x-1)*m+y;
}
int pp(int x, int y)
{
return (x-1)*m+y+n*m;
}
int main()
{
#ifdef MPS
fp("1.in","r",stdin);
fp("1.out","w",stdout);
#endif
sf("%d%d",&n,&m);
fo(i,1,n) sf("%s",a[i]+1);
fo(i,1,n) fo(j,1,m) if(a[i][j] == 'R')
{
if(j+2 <= m && a[i][j+1] == 'G' && a[i][j+2] == 'W')
{
t[i][j].pb(p(i,j));
if(i>1 && i < n && a[i-1][j+1] == 'R' && a[i+1][j+1] == 'W')
link(p(i,j), pp(i-1,j+1));
if(i>2 && a[i-2][j+2] == 'R' && a[i-1][j+2] == 'G')
link(p(i,j), pp(i-2,j+2));
if(i <= n-2 && a[i+1][j] == 'G' && a[i+2][j] == 'W')
link(p(i,j), pp(i,j));
}
if(i+2 <= n && a[i+1][j] == 'G' && a[i+2][j] == 'W')
{
t[i][j].pb(pp(i,j));
if(j>1 && j < m && a[i+1][j-1] == 'R' && a[i+1][j+1] == 'W')
link(pp(i,j), p(i+1,j-1));
if(j>2 && a[i+2][j-2] == 'R' && a[i+2][j-1] == 'G')
link(pp(i,j), p(i+2,j-2));
if(j <= m-2 && a[i][j+1] == 'G' && a[i][j+2] == 'W')
link(pp(i,j), p(i,j));
}
}
int ans = 0;
memset(b,-1,sizeof(b));
fo(i,1,n) fo(j,1,m) for(auto p: t[i][j]) if(b[p] == -1)
{
s0 = s1 = 0;
color(p);
ans += max(s0, s1);
}
pf("%d\n",ans);
return 0;
}
Compilation message
dango_maker.cpp: In function 'int main()':
dango_maker.cpp:65:4: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
sf("%d%d",&n,&m);
^
dango_maker.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
fo(i,1,n) sf("%s",a[i]+1);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
200 ms |
263168 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
200 ms |
263168 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
200 ms |
263168 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
