#include using namespace std; typedef signed long long ll; #undef _P #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) //------------------------------------------------------- ll H,W; int N; ll X[101010],Y[101010]; void solve() { int i,j,k,l,r,x,y; string s; cin>>W>>H; cin>>N; int C[2]={}; FOR(i,N) { cin>>X[i]>>Y[i]; X[i]--; Y[i]--; C[(X[i]+Y[i])%2]++; } if(C[0]>0 && C[0]X[1]) swap(X[0],X[1]),swap(Y[0],Y[1]); if(abs(X[0]-X[1])abs(Y[0]-Y[1])) cout<