diff --git a/src/main/java/com/dota/slidingWindow/_1156/Solution.java b/src/main/java/com/dota/slidingWindow/_1156/Solution.java
new file mode 100644
index 0000000..d16800c
--- /dev/null
+++ b/src/main/java/com/dota/slidingWindow/_1156/Solution.java
@@ -0,0 +1,38 @@
+package com.dota.slidingWindow._1156;
+
+class Solution {
+	public int maxRepOpt1(String text) {
+		int res = 1;
+		var dp = new int[26];
+		for (int i = 0; i < text.length(); i++) {
+			dp[text.charAt(i) - 'a']++;
+		}
+		for (int i = 0; i < 26; i++) {
+			int cnt = 0;
+			int other = 0;
+			int l = 0;
+			for (int j = 0; j < text.length(); j++) {
+				if (text.charAt(j) - 'a' == i) {
+					cnt++;
+				} else {
+					other++;
+					while (other > 1) {
+						if (text.charAt(l) - 'a' != i) {
+							other--;
+						} else {
+							cnt--;
+						}
+						l++;
+					}
+				}
+
+				int t = 0;
+				if (cnt < dp[i]) {
+					t = cnt + 1;
+				}
+				res = Math.max(res, t);
+			}
+		}
+		return res;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/com/dota/slidingWindow/_1712/Solution.java b/src/main/java/com/dota/slidingWindow/_1712/Solution.java
new file mode 100644
index 0000000..91dd06e
--- /dev/null
+++ b/src/main/java/com/dota/slidingWindow/_1712/Solution.java
@@ -0,0 +1,35 @@
+package com.dota.slidingWindow._1712;
+
+class Solution {
+	public static void main(String[] args) {
+		new Solution().waysToSplit(new int[]{0,0,3,3});
+	}
+	public int waysToSplit(int[] nums) {
+		long res = 0;
+		int a = 0;
+		int sum = 0;
+		for (int num : nums) {
+			sum += num;
+		}
+
+		int limit = sum / 3;
+		for (int i = 0; a <= limit; i++) {
+			a += nums[i];
+			if (a>limit) {
+				break;
+			}
+			int j = i + 1;
+			int t = (sum - a) / 2;
+			int b = 0;
+			while (b <= a) {
+				b += nums[j++];
+			}
+			int k = j;
+			while (b <= t) {
+				b += nums[k++];
+			}
+			res += (k - j);
+		}
+		return (int) res%1000000007;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/com/dota/slidingWindow/_2761/Solution.java b/src/main/java/com/dota/slidingWindow/_2761/Solution.java
index a336c78..cce3521 100644
--- a/src/main/java/com/dota/slidingWindow/_2761/Solution.java
+++ b/src/main/java/com/dota/slidingWindow/_2761/Solution.java
@@ -2,6 +2,6 @@ package com.dota.slidingWindow._2761;
 
 class Solution {
     public long continuousSubarrays(int[] nums) {
-
+        return 0;
     }
 }
\ No newline at end of file