View Compilation Error

0_0_37784728_2479.cpp: In function 'void work()':
0_0_37784728_2479.cpp:26:10: error: 'INF' was not declared in this scope
  a[n+1]=-INF,b[n+1]=-INF,c[n+1]=-INF,d[n+1]=-INF;
          ^