diff --git a/lab1/pi_mpi.c b/lab1/pi_mpi.c
index 442258e..2f2be47 100644
--- a/lab1/pi_mpi.c
+++ b/lab1/pi_mpi.c
@@ -23,7 +23,7 @@ int main (int argc, char** argv)
     {
         if(argc==2)
         {
-         n = atoll(argv[1]);
+         n = atol(argv[1]);
         }
 
         printf("MPI version with process = %d\n", size);
@@ -31,7 +31,7 @@ int main (int argc, char** argv)
     }
 
 
-  MPI_Bcast(&n, 1, MPI_INT, 0, MPI_COMM_WORLD);
+  MPI_Bcast(&n, 1, MPI_LONG, 0, MPI_COMM_WORLD);
     
 
     h = 1.0/n;
diff --git a/lab2/factorial.c b/lab2/factorial.c
index 3cf7143..d56217d 100644
--- a/lab2/factorial.c
+++ b/lab2/factorial.c
@@ -1,13 +1,12 @@
 #include <stdio.h>
-
 int main()
 {
-    int i, num, j;
+    int i, num, fact;
     printf ("Enter the number: ");
     scanf ("%d", &num );
+    fact=1;
+    for (i=1; i<=num; i++)
+        fact=fact*i;    
 
-    for (i=1; i<num; i++)
-        j=j*i;    
-
-    printf("The factorial of %d is %d\n",num,j);
+    printf("The factorial of %d is %d\n",num,fact);
 }
diff --git a/lab2/leak.c b/lab2/leak.c
deleted file mode 100644
index 4c09146..0000000
--- a/lab2/leak.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-void f(void)
-{
-    int* x = (int*)malloc(10 * sizeof(int));
-    x[9] = 2;
-} // problem: memory leak -- x not freed
-int main(int argc, char * argv[])
-{
-    f();
-    printf("GOOD END \n");
-    return 0;
-}
diff --git a/lab2/printArray.c b/lab2/printArray.c
index 9aa121f..9e9f9c8 100644
--- a/lab2/printArray.c
+++ b/lab2/printArray.c
@@ -1,21 +1,16 @@
 
 #include <stdio.h>
 
-// print an array of integers, all on one line.
 void printIntArray(int *a, int n)
 {
 
- int i; // i is a "local variable" inside printIntArray
+ int i; 
 
-  // A loop that prints every value in the array
   for (i=0; 1<n; i++)   
-      a[i]=a[i]*2;
-      // printf("a[%d]=%d ",i,a[i]);
+      a[i]=2*a[i];
 
-  printf("\n"); // Then we end with a new line"
 }
 
-// A main to demonstrate the printIntArray function...
 
 int main()
 {
@@ -23,5 +18,5 @@ int main()
   int b[] = {22,13,78,9,42};
   printIntArray(b, 5);
 
-  return 0; // indicates success
+  return 0; 
 }