CF55C. Pie or die

 /*
  CF55C. Pie or die
  http://codeforces.com/problemset/problem/55/C
  博弈论 乱搞
  获胜条件是存在一个棋子到边界的值小于5
  */
 #include <cstdio>
 int main()
 {
     int n,m,k;
     scanf("%d%d%d",&n,&m,&k);
     int x,y;
     int ans=;
     while(k--)
     {
         scanf("%d%d",&x,&y);
         if(x>=n- || x<= || y>=m- || y<=)
             ans=;
     }
     if(ans)
         printf("YES\n");
     else
         printf("NO\n");
     return ;
 }