scompt
diff --git a/‎day04/main.go
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+29Lines changed: 29 additions & 0 deletions b/‎day04/main.go
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+29Lines changed: 29 additions & 0 deletions
diff --git a/‎day04/main_test.go
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+4Lines changed: 4 additions & 0 deletions b/‎day04/main_test.go
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+4Lines changed: 4 additions & 0 deletions
@@ -36,7 +36,36 @@ func partOne(input string) (fullyContained int) {
 	return
 }
 
+func partTwo(input string) (fullyContained int) {
+	lines := strings.Split(strings.TrimRight(input, "\n"), "\n")
+
+	for _, line := range lines {
+		left, right, _ := strings.Cut(line, ",")
+		leftFromStr, leftToStr, _ := strings.Cut(left, "-")
+		rightFromStr, rightToStr, _ := strings.Cut(right, "-")
+
+		// fmt.Printf("%s %s %s %s\n", leftFromStr, leftToStr, rightFromStr, rightToStr)
+
+		leftFrom, _ := strconv.Atoi(leftFromStr)
+		leftTo, _ := strconv.Atoi(leftToStr)
+		rightFrom, _ := strconv.Atoi(rightFromStr)
+		rightTo, _ := strconv.Atoi(rightToStr)
+
+		// fmt.Printf("%d %d %d %d\n", leftFrom, leftTo, rightFrom, rightTo)
+
+		if (leftTo >= rightFrom && leftFrom <= rightTo) ||
+			(rightTo >= leftFrom && rightFrom <= leftTo) {
+			fullyContained += 1
+		}
+	}
+
+	return
+}
+
 func main() {
 	score1 := partOne(input2)
 	fmt.Printf("%d\n", score1)
+
+	score2 := partTwo(input2)
+	fmt.Printf("%d\n", score2)
 }
@@ -13,3 +13,7 @@ var input1 string
 func TestOne(t *testing.T) {
 	assert.Equal(t, 2, partOne(input1), "they should be equal")
 }
+
+func TestTwo(t *testing.T) {
+	assert.Equal(t, 4, partTwo(input1), "they should be equal")
+}
Original file line number	Diff line number	Diff line change
`@@ -13,3 +13,7 @@ var input1 string`
`13`	`13`	`func TestOne(t *testing.T) {`
`14`	`14`	`assert.Equal(t, 2, partOne(input1), "they should be equal")`
`15`	`15`	`}`
	`16`	`+`
	`17`	`+func TestTwo(t *testing.T) {`
	`18`	`+ assert.Equal(t, 4, partTwo(input1), "they should be equal")`
	`19`	`+}`