diff --git a/20201223/main.go b/20201223/main.go
new file mode 100644
index 0000000..50778c1
--- /dev/null
+++ b/20201223/main.go
@@ -0,0 +1,32 @@
+package main
+
+import "sort"
+
+func main() {
+
+}
+
+func find(target int, candidates []int) [][]int {
+	l := len(candidates)
+	var ret [][]int
+	sort.Ints(candidates)
+	for k, n := range candidates {
+		for j := 1; j < l-k-1; j++ {
+			sum := n
+			nums := []int{n}
+			for i := k + j; i < l; i++ {
+				num := candidates[i]
+				sum += num
+				if sum > target {
+					break
+				}
+				nums = append(nums, num)
+				if sum == target {
+					ret = append(ret, nums)
+					break
+				}
+			}
+		}
+	}
+	return ret
+}
diff --git a/20201223/main_test.go b/20201223/main_test.go
new file mode 100644
index 0000000..f64d911
--- /dev/null
+++ b/20201223/main_test.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_find(t *testing.T) {
+	type args struct {
+		target     int
+		candidates []int
+	}
+	tests := []struct {
+		name string
+		args args
+		want [][]int
+	}{
+		{
+			"test1",
+			args{
+				8,
+				[]int{10, 1, 2, 7, 6, 1, 5},
+			},
+			[][]int{
+				{1, 7},
+				{1, 2, 5},
+				{2, 6},
+				{1, 1, 6},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := find(tt.args.target, tt.args.candidates); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("find() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}