diff --git a/Problem_006/6_007.cpp b/Problem_006/6_007.cpp
index a69e47f..0a80632 100644
--- a/Problem_006/6_007.cpp
+++ b/Problem_006/6_007.cpp
@@ -2,37 +2,36 @@
 
 using namespace std;
 
-void Nhap(int[], int&);
-int GTLN(int[],int);
+void Nhap(int[], int &);
+int GTLN(int[], int);
 
 int main()
 {
-	int a[5000];
-	int n;
-	Nhap(a, n);
-	cout << GTLN(a, n);
-	return 0;
+    int a[5000];
+    int n;
+    Nhap(a, n);
+    cout << GTLN(a, n);
+    return 0;
 }
 
-void Nhap(int a[], int& n)
+void Nhap(int a[], int &n)
 {
-	cin >> n;
-	for (int i = 0; i < n; i++)
-		cin >> a[i];
+    cin >> n;
+    for (int i = 0; i < n; i++)
+        cin >> a[i];
 }
 
-int GTLN(int a[],int n)
+int GTLN(int a[], int n)
 {
-	int max2 = a[0];
-	int max = a[0];
-	for (int i = 0; i < n; i++)
-		if (max < a[i])
-			max = a[i];
-	for (int i = n-1; i>=0; i--)
-		if (max > a[i] && max2 <= a[i])
-			max2 = a[i];
-	if (max == max2)
-		return 0;
-	return max2;
+    int max2 = -1;
+    int max = a[0];
+    for (int i = 0; i < n; i++)
+        if (max < a[i])
+            max = a[i];
+    for (int i = n - 1; i >= 0; i--)
+        if (max > a[i] && max2 < a[i])
+            max2 = a[i];
+    if (max2 == -1)
+        return 0;
+    return max2;
 }
-