feat: 342. Power of Four (#101)

Signed-off-by: ashing <[email protected]>

Author: ronething

leetcode/0342/342. Power of Four.go

@@ -0,0 +1,5 @@
+package _342
+
+func isPowerOfFour(n int) bool {
+	return n > 0 && n&(n-1) == 0 && n&0xaaaaaaaa == 0
+}

leetcode/0342/342. Power of Four_test.go

@@ -0,0 +1,29 @@
+package _342
+
+import "testing"
+
+func Test_isPowerOfFour(t *testing.T) {
+	type args struct {
+		n int
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "one",
+			args: args{
+				n: 16,
+			},
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isPowerOfFour(tt.args.n); got != tt.want {
+				t.Errorf("isPowerOfFour() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}