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Artifact 7755a8c9ae69e1f9124b5db699061faddac70458


#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <algorithm>
#include <numeric>
#include <iterator>
#include <functional>
#include <complex>
#include <queue>
#include <stack>
#include <cmath>
#include <cassert>
using namespace std;
typedef long long LL;
typedef long double LD;
typedef complex<LD> CMP;

static const unsigned MODVAL = 1000000007;
struct mint
{
	unsigned val;
	mint():val(0){}
	mint(int      x):val(x%MODVAL) {}
	mint(unsigned x):val(x%MODVAL) {}
	mint(LL       x):val(x%MODVAL) {}
};
mint& operator+=(mint& x, mint y) { return x = x.val+y.val; }
mint& operator-=(mint& x, mint y) { return x = x.val-y.val+MODVAL; }
mint& operator*=(mint& x, mint y) { return x = LL(x.val)*y.val; }
mint operator+(mint x, mint y) { return x+=y; }
mint operator-(mint x, mint y) { return x-=y; }
mint operator*(mint x, mint y) { return x*=y; }

mint POW(mint x, LL e) { mint v=1; for(;e;x*=x,e>>=1) if(e&1) v*=x; return v; }
mint& operator/=(mint& x, mint y) { return x *= POW(y, MODVAL-2); }
mint operator/(mint x, mint y) { return x/=y; }

vector<mint> FAC_(1,1);
mint FAC(LL n) { while( FAC_.size()<=n ) FAC_.push_back( FAC_.back()*FAC_.size() ); return FAC_[n]; }

// nCk :: O(1) time, O(n^2) space.
vector< vector<mint> > CP_;
mint C(LL n, LL k) {
	while( CP_.size() <= n ) {
		int nn = CP_.size();
		CP_.push_back(vector<mint>(nn+1,1));
		for(int kk=1; kk<nn; ++kk)
			CP_[nn][kk] = CP_[nn-1][kk-1] + CP_[nn-1][kk];
	}
	return k<0 || n<k ? 0 : CP_[n][k];
}

struct UnionFind
{
	vector<int> uf, sz;
	int nc;

	UnionFind(int N): uf(N), sz(N,1), nc(N)
		{ for(int i=0; i<N; ++i) uf[i] = i; }
	int size()
		{ return nc; }
	int size(int a)
		{ return sz[Find(a)]; }
	int Find(int a)
		{ return uf[a]==a ? a : uf[a]=Find(uf[a]); }
	bool Union(int a, int b)
		{
			a = Find(a);
			b = Find(b);
			if( a != b )
			{
				if( sz[a] >= sz[b] ) swap(a, b);
				uf[a] = b;
				sz[b] += sz[a];
				--nc;
			}
			return (a!=b);
		}
};

class GooseInZooDivOne { public:
	int count(vector <string> field, int dist)
	{
		int H = field.size();
		int W = field[0].size();
		vector<pair<int,int> > b;
		for(int y=0; y<H; ++y)
		for(int x=0; x<W; ++x)
			if(field[y][x] == 'v')
				b.push_back(make_pair(y,x));

		int N = b.size();
		UnionFind uf(N);
		for(int i=0; i<N; ++i)
		for(int k=i+1; k<N; ++k) {
			int y = b[i].first;
			int x = b[i].second;
			int Y = b[k].first;
			int X = b[k].second;
			if(abs(y-Y)+abs(x-X) <= dist)
				uf.Union(i, k);
		}

		int num[2]={0,0};
		for(int i=0; i<N; ++i)
			if(uf.Find(i) == i)
				num[uf.size(i)%2] ++;
		return solve(num[0], num[1]).val;
	}

	mint solve(int ev, int od)
	{
		mint total = 0;
		for(int k=0; k<=od; k+=2)
			total += C(od, k);
		return POW(2, ev) * total - 1;
	}
};

// BEGIN CUT HERE
#include <ctime>
double start_time; string timer()
 { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
 { os << "{ ";
   for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
   os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
void verify_case(const int& Expected, const int& Received) {
 bool ok = (Expected == Received);
 if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
 cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
#define END	 verify_case(_, GooseInZooDivOne().count(field, dist));}
int main(){

CASE(0)
	string field_[] = {"vvv"};
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = 0; 
	int _ = 3; 
END
CASE(1)
	string field_[] = {"."};
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = 100; 
	int _ = 0; 
END
CASE(2)
	string field_[] = {"vvv"};
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = 1; 
	int _ = 0; 
END
CASE(3)
	string field_[] = {"v.v..................v............................"
,".v......v..................v.....................v"
,"..v.....v....v.........v...............v......v..."
,".........vvv...vv.v.........v.v..................v"
,".....v..........v......v..v...v.......v..........."
,"...................vv...............v.v..v.v..v..."
,".v.vv.................v..............v............"
,"..vv.......v...vv.v............vv.....v.....v....."
,"....v..........v....v........v.......v.v.v........"
,".v.......v.............v.v..........vv......v....."
,"....v.v.......v........v.....v.................v.."
,"....v..v..v.v..............v.v.v....v..........v.."
,"..........v...v...................v..............v"
,"..v........v..........................v....v..v..."
,"....................v..v.........vv........v......"
,"..v......v...............................v.v......"
,"..v.v..............v........v...............vv.vv."
,"...vv......v...............v.v..............v....."
,"............................v..v.................v"
,".v.............v.......v.........................."
,"......v...v........................v.............."
,".........v.....v..............vv.................."
,"................v..v..v.........v....v.......v...."
,"........v.....v.............v......v.v............"
,"...........v....................v.v....v.v.v...v.."
,"...........v......................v...v..........."
,"..........vv...........v.v.....................v.."
,".....................v......v............v...v...."
,".....vv..........................vv.v.....v.v....."
,".vv.......v...............v.......v..v.....v......"
,"............v................v..........v....v...."
,"................vv...v............................"
,"................v...........v........v...v....v..."
,"..v...v...v.............v...v........v....v..v...."
,"......v..v.......v........v..v....vv.............."
,"...........v..........v........v.v................"
,"v.v......v................v....................v.."
,".v........v................................v......"
,"............................v...v.......v........."
,"........................vv.v..............v...vv.."
,".......................vv........v.............v.."
,"...v.............v.........................v......"
,"....v......vv...........................v........."
,"....vv....v................v...vv..............v.."
,".................................................."
,"vv........v...v..v.....v..v..................v...."
,".........v..............v.vv.v.............v......"
,".......v.....v......v...............v............."
,"..v..................v................v....v......"
,".....v.....v.....................v.v......v......."};
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = 3; 
	int _ = 898961330; 
END
/*
CASE(4)
	string field_[] = ;
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = ; 
	int _ = ; 
END
CASE(5)
	string field_[] = ;
	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_)); 
	int dist = ; 
	int _ = ; 
END
*/
}
// END CUT HERE