there n car go destination onelane road the destination target mile awayyou give integer array position speed length n positioni position ith car speedi speed ith car mile houra car pass car ahead catch drive bumper bumper speed the fast car slow match slow car speed the distance car ignore ie assume positiona car fleet nonempty set car drive position speed note single car car fleetIf car catch car fleet right destination point consider car fleetreturn number car fleet arrive destination Example 1input target 12 position 108053 speed 24113output 3explanationthe car start 10 speed 2 8 speed 4 fleet meet 12the car start 0 catch car fleet itselfthe car start 5 speed 1 3 speed 3 fleet meeting 6 the fleet move speed 1 reach targetnote car meet fleet destination answer 3example 2input target 10 position 3 speed 3output 1explanation there car fleetExample 3input target 100 position 024 speed 421output 1explanationthe car start 0 speed 4 2 speed 2 fleet meeting 4 the fleet move speed 2then fleet speed 2 car start 4 speed 1 fleet meeting 6 the fleet move speed 1 reach target Constraintsn positionlength speedlength1 n 1050 target 1060 positioni targetall value position unique0 speedi 106