diff --git a/solution/525/main.go b/solution/525/main.go
new file mode 100644
index 0000000..470259b
--- /dev/null
+++ b/solution/525/main.go
@@ -0,0 +1,30 @@
+package main
+
+func findMaxLength(nums []int) int {
+    hashmap := make(map[int]int)
+    zeros, ones, maxLen := 0, 0, 0
+    hashmap[0] = -1
+    
+    for i, num := range nums {
+        if num == 0 {
+            zeros++
+        } else {
+            ones++
+        }
+        diff := zeros - ones
+        if val, ok := hashmap[diff]; ok {
+            maxLen = max(maxLen, i - val)
+        } else {
+            hashmap[diff] = i
+        }
+    }
+    
+    return maxLen
+}
+
+func max(a, b int) int {
+    if a > b {
+        return a
+    }
+    return b
+}