View Compilation Error

0_0_14743890_16243.cpp: In function 'int slove(int, int)':
0_0_14743890_16243.cpp:49:16: error: 'INF' was not declared in this scope
  int MAX=0,MIN=INF,ans=0;
                ^
0_0_14743890_16243.cpp:53:21: error: 'ans' was not declared in this scope
   if ((MAX-MIN)>=k) ans++;
                     ^
0_0_14743890_16243.cpp:60:18: error: 'ans' was not declared in this scope
  if (MAX-MIN>=k) ans++;
                  ^
0_0_14743890_16243.cpp:61:9: error: 'ans' was not declared in this scope
  return ans;
         ^