text: Finding prefix sum
code: for ( let s = min_x ; s <= max_x ; s ++ ) { if ( weight_at_x . get ( s ) == null ) sum_till . push ( sum_till [ sum_till . length - 1 ] ) ; else sum_till . push ( sum_till [ sum_till . length - 1 ] + weight_at_x . get ( s ) ) ; } let total_sum = sum_till [ sum_till . length - 1 ] ; let partition_possible = 0 ; for ( let i = 1 ; i < sum_till . length ; i ++ ) { if ( sum_till [ i ] == total_sum - sum_till [ i ] ) partition_possible = 1 ;