#include #include #include using namespace std; long mod=1e8+7; long power(long a,long b){return b?power(a*a%mod,b/2)*(b%2?a:1)%mod:1;} long F[2<<17],I[2<<17]; long C(int N,int K){return F[N]*I[N-K]%mod*I[K]%mod;} int H,W,K; int a[20],b[20]; long A[1<<20]; main() { F[0]=1; for(int i=1;i<2<<17;i++)F[i]=F[i-1]*i%mod; I[(2<<17)-1]=power(F[(2<<17)-1],mod-2); for(int i=(2<<17)-1;i--;)I[i]=I[i+1]*(i+1)%mod; cin>>H>>W>>K; for(int i=0;i>a[i]>>b[i]; for(int i=0;i<1< >AB; for(int j=0;j>j&1)AB.push_back(make_pair(a[j],b[j])); sort(AB.begin(),AB.end()); for(pairab:AB) { if(nx<=ab.first&&ny<=ab.second) { int dx=ab.first-nx,dy=ab.second-ny; ans=ans*C(dx+dy,dx)%mod; nx=ab.first; ny=ab.second; } else ans=0; } int dx=H-nx,dy=W-ny; ans=ans*C(dx+dy,dx)%mod; A[i]=AB.size()%2?mod-ans:ans; } for(int i=0;i>i&1)(A[j]+=A[j^1<