! Try yukicoder
! author: Leonardone @ NEETSDKASU
 
      PROGRAM yukicoder
          INTEGER :: a1, a2, a3, b1, b2, b3, p, c
 
          READ(*,*) a1, a2, a3
          
          IF (a2 > a1 .and. a2 > a3 .and. a1 /= a3) THEN
              PRINT '(A)', 'INF'
              STOP
          END IF
          
          IF (a2 < a1 .and. a2 < a3 .and. a1 /= a3) THEN
              PRINT '(A)', 'INF'
              STOP
          END IF
          
          c = 0
          DO p = MAX(a1, a2, a3), 1, -1
              b1 = MOD(a1, p)
              b2 = MOD(a2, p)
              b3 = MOD(a3, p)
              IF (b1 == b3) cycle
              IF (b2 > b1 .and. b2 > b3) THEN
                  c = c + 1
              ELSE IF (b2 < b1 .and. b2 < b3) THEN
                  c = c + 1
              END IF
          END DO
          
          PRINT '(I0)', c

      END PROGRAM yukicoder