fix penalty bug

src/main.odin

@@ -38,14 +38,6 @@ read_data :: proc(file: string) -> (res: [NUMBER_OF_ITEMS]Item, ok := true) {
 
 Chromosome :: bit_array.Bit_Array
 
-distance :: proc(x, y: int) -> int {
-	return math.abs(x - y)
-}
-
-penalize :: proc(d: int) -> int {
-	return math.min(d, 0)
-}
-
 // side-effect: reads global `items`
 fitness :: proc(chrom: ^Chromosome) -> int {
 	tot_profit, tot_weight := 0, 0
@@ -54,7 +46,7 @@ fitness :: proc(chrom: ^Chromosome) -> int {
 		tot_profit += items[idx].profit
 		tot_weight += items[idx].weight
 	}
-	return tot_profit + penalize(distance(tot_weight, CAPACITY))
+	return tot_profit - 3 * math.max(tot_weight - CAPACITY, 0)
 }
 
 Population :: [POPULATION_SIZE]Chromosome