diff --git a/src/main/java/com/dota/slidingWindow/_2134/Solution.java b/src/main/java/com/dota/slidingWindow/_2134/Solution.java
new file mode 100644
index 0000000..44f9ea4
--- /dev/null
+++ b/src/main/java/com/dota/slidingWindow/_2134/Solution.java
@@ -0,0 +1,34 @@
+package com.dota.slidingWindow._2134;
+
+class Solution {
+	public int minSwaps(int[] nums) {
+		int k = 0;
+		for (int num : nums) {
+			if (num == 1) k++;
+		}
+
+		if (k == 0 || k == nums.length) return 0;
+		int n = nums.length;
+		int cnt = 0;
+		for (int i = 0; i < k; i++) {
+			cnt += nums[i];
+		}
+		int min = cnt;
+		int l = 0;
+		for (int i = k; i < n + k - 1; i++) {
+			int idx = i;
+			if (i >= n) {
+				idx = i - n;
+			}
+			if (nums[idx] == 0) {
+				cnt++;
+			}
+			if (nums[l++] == 0) {
+				cnt--;
+			}
+
+			min = Math.min(min, cnt);
+		}
+		return min;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/com/dota/stack/Solution.java b/src/main/java/com/dota/stack/Solution.java
new file mode 100644
index 0000000..6d8d318
--- /dev/null
+++ b/src/main/java/com/dota/stack/Solution.java
@@ -0,0 +1,24 @@
+package com.dota.stack;
+
+class Solution {
+	public boolean canBeValid(String s, String locked) {
+		if (s.length() % 2 == 1) {
+			return false;
+		}
+		int min = 0, max = 0;
+		for (int i = 0; i < s.length(); i++) {
+			if (locked.charAt(i) == '1') { //不能改
+				int d = s.charAt(i) == '(' ? 1 : -1;
+				min += d;
+				max += d;
+				if (max<0) return false;
+			} else { //可以改
+				max++;
+				min--;
+			}
+			if (min<0) min=1;
+		}
+
+		return min == 0;
+	}
+}
\ No newline at end of file