diff --git a/354_Max Envelopes b/354_Max Envelopes
new file mode 100644
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--- /dev/null
+++ b/354_Max Envelopes	
@@ -0,0 +1,25 @@
+public static int maxEnvelopes(int[][] arr) {
+
+		Arrays.sort(arr,(a, b)->{ 
+			// 0'th index-> width and 1'st index -> height, 
+			// for C++: sort(arr.begin(),arr.end(),[](vector<int>& a,vector<int>& b){ //logic });
+			if(a[0]==b[0]) return b[1] - a[1];   // reverse sort.  for c++ replace '-' with '<'
+			else return a[0]-b[0];   // default sort.  for c++ replace '-' with '<'
+		});
+
+		int n=arr.length;
+		int[] dp=new int[n];
+		int maxLen = 0;
+		for (int i =0;i<n;i++) {
+			dp[i] = 1;
+			for (int j = 0; j < i; j++) { 
+				if (arr[i][1] > arr[j][1]) { // compare height. 
+					dp[i] = Math.max(dp[i], dp[j] + 1);
+				}
+			}
+			maxLen = Math.max(maxLen, dp[i]);
+		}
+
+		return maxLen;
+	}
+