diff --git a/tests/PA1/mytest1.c b/tests/PA1/mytest1.c
new file mode 100644
index 000000000..4d37fb435
--- /dev/null
+++ b/tests/PA1/mytest1.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include "support.h"
+
+int main(int argc, char const *argv[])
+{
+	int n = 10;
+	int m = 5;
+	int o = 6;
+	int *** arr = mymalloc(m*sizeof(int **));
+	for (int i=0;i<m;i++)
+	{
+		if (i!=4)
+		{
+			arr[i] = mymalloc(n*sizeof(int *));
+		}
+	}
+	for (int i=0; i<m; i++)
+	{
+		for (int j=0;j<n;j++)
+		{
+			if (j != 3)
+			{
+				arr[i][j] = mymalloc(o*sizeof(int));
+			}
+		}
+	}
+	int sum = 0;
+	for (int i=0; i<m; i++)
+	{
+		for (int j=0; j<n ; j++)
+		{
+			int * curr = arr[i][j];
+			for (int k=0;k<o;k++)
+			{
+				curr[k] = i+j-o;
+			}
+		
+		}
+	}
+	return 0;
+}
diff --git a/tests/PA1/mytest2.c b/tests/PA1/mytest2.c
new file mode 100644
index 000000000..63a72bdf3
--- /dev/null
+++ b/tests/PA1/mytest2.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include "support.h"
+
+struct node 
+{
+	int val;
+	struct node * next;
+};
+
+int main(int argc, char const *argv[])
+{
+	struct node * head = (struct node * ) mymalloc(sizeof(struct node));
+	struct node * curr = head;
+	for (int i=0 ; i<10; i++)
+	{
+		curr->val = i+5;
+		curr->next = (struct node * )mymalloc(sizeof(struct node));
+		curr = curr->next;
+	}
+	curr = head;
+	int i = 5;
+	int sum = 0;
+	while (i>0)
+	{
+		sum += curr->val;
+		curr = curr->next;
+		i--;
+	}
+	printf("%d\n",sum);
+	return 0;
+}
diff --git a/tests/PA1/mytest3.c b/tests/PA1/mytest3.c
new file mode 100644
index 000000000..a5720ef11
--- /dev/null
+++ b/tests/PA1/mytest3.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include "support.h"
+
+int main(int argc, char const *argv[])
+{
+	FILE * fptr = fopen("fdshg","r");	
+	printf("%d\n",fptr->_flags);
+	return 0;
+}
diff --git a/tests/PA1/mytest4.c b/tests/PA1/mytest4.c
new file mode 100644
index 000000000..d070e3b8a
--- /dev/null
+++ b/tests/PA1/mytest4.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include "support.h"
+
+int main(int argc, char const *argv[])
+{
+	int input;
+	scanf("%d",&input);
+	int * ptr;
+	if (input>0)
+	{
+		ptr = mymalloc(4);
+	}else
+	{
+		ptr = NULL;
+	}
+	*ptr = 6;
+	return 0;
+}
diff --git a/tests/PA1/mytest5.c b/tests/PA1/mytest5.c
new file mode 100644
index 000000000..781e4b05b
--- /dev/null
+++ b/tests/PA1/mytest5.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include "support.h"
+
+int main(int argc, char const *argv[])
+{
+	int * p;	
+	int addr;
+	scanf("%d",&addr);
+	p = (int *)addr;
+	*p = 5;
+	return 0;
+}