diff --git "a/day1/\344\275\234\344\270\232/GO7031-\346\235\216\346\265\267\350\266\205/homework1.txt" "b/day1/\344\275\234\344\270\232/GO7031-\346\235\216\346\265\267\350\266\205/homework1.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..44ddfd187d5d59fea1d6bb1cb4ff184ccc0e444c
--- /dev/null
+++ "b/day1/\344\275\234\344\270\232/GO7031-\346\235\216\346\265\267\350\266\205/homework1.txt"
@@ -0,0 +1,27 @@
+package main
+import (
+	"fmt"
+	"math"
+	"strings"
+)
+func BinaryFormat(n int32) string {
+	a := uint32(n)
+	sb := strings.Builder{}
+	c := uint32(math.Pow(2, 31))
+	for i := 0; i < 32; i++ {
+		if a&c != 0 {
+			sb.WriteString("1")
+		} else {
+			sb.WriteString("0")
+		}
+		c >>= 1
+	}
+	return sb.String()
+}
+func main() {
+	fmt.Println(BinaryFormat(0))
+	fmt.Println(BinaryFormat(1))
+	fmt.Println(BinaryFormat(-1))
+	fmt.Println(BinaryFormat(260))
+	fmt.Println(BinaryFormat(-260))
+}
\ No newline at end of file