#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INF 2000000000 using namespace std; int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; #define sym cout<<"---------"< #define P pair #define mk make_pair #define en endl #define WHITE 0 #define BLACK 2 #define GRAY 1 #define RE return 0 #define int ll int num[4]; signed main(){ int a,b; cin>>a>>b; int l=0,i=0; while(l