start 2024, 2024-01

2024/01.odin

@@ -0,0 +1,41 @@
+package aoc
+
+import "core:math"
+import "core:fmt"
+import "core:sort"
+import "core:strconv"
+import "core:strings"
+
+day01 :: proc() {
+	input := slurp_lines("input/01")
+	defer delete(input)
+
+	left := make([dynamic]int, 0, len(input))
+	right := make([dynamic]int, 0, len(input))
+	for line in input {
+		sp := strings.split(line, "   ")
+		a, _ := strconv.parse_int(sp[0])
+		b, _ := strconv.parse_int(sp[1])
+		append(&left, a)
+		append(&right, b)
+	}
+	sort.quick_sort(left[:])
+	sort.quick_sort(right[:])
+	
+	p1: int
+	for i in 0..<len(left) {
+	    p1 += math.abs(left[i] - right[i])
+	}
+	fmt.println(p1)
+	
+	count: map[int]int
+	for r in right {
+	    count[r] += 1
+	}
+ 
+	p2: int
+	for l in left {
+	    p2 += l * count[l]
+	}
+	fmt.println(p2)
+}