Driver program to test above function
let cost = [ [ 0 , 15 , 80 , 90 ] , [ INF , 0 , 40 , 50 ] , [ INF , INF , 0 , 70 ] , [ INF , INF , INF , 0 ] ] ; document . write ( " " + " " + N + " " + minCost ( cost ) ) ;