diff --git a/CANDY.cpp b/CANDY.cpp
index 077dbfe..867173b 100644
--- a/CANDY.cpp
+++ b/CANDY.cpp
@@ -1,31 +1,32 @@
-/*
-USER: zobayer
-TASK: CANDY
-ALGO: ad-hoc
-*/
+#include <iostream>
 
-#include <ios>
+using namespace std;
 
 int main()
-{
-	int a[10001], n, i, avr, sum, total;
-	while(scanf("%d", &n) == 1 && n > 0)
-	{
-		for(i=sum=0; i < n; i++)
-		{
-			scanf("%d", &a[i]);
-			sum += a[i];
-		}
-		if(sum % n == 0)
-		{
-			avr = sum / n;
-			for(i=total=0; i < n; i++)
-				if(a[i] < avr)
-					total += avr - a[i];
-			printf("%d\n", total);
-		}
-		else printf("-1\n");
-	}
-	return 0;
-}
+{   int a[10001];
+    int n;
+    int i;
+    int s=0;
+    while(1)
+    {
+        i=0;
+        s=0;
+        cin>>n;
+        int t=n;
+        if(n==-1) break;
+        while(t--)
+        {
+            int x;
+            cin>>x;
+            a[i++]=x;
+            s+=x;
 
+        }
+        if(s%n!=0) cout<<-1<<endl;
+        else{
+            int o=0;
+            for(int k=0;k<n;k++) if(a[k] - (s/n)>0) o += a[k] - (s/n);
+            cout<<o<<endl;
+        }
+    }
+}
diff --git a/EGYPIZZA.cpp b/EGYPIZZA.cpp
old mode 100644
new mode 100755
index 7ca6f96..607750a
--- a/EGYPIZZA.cpp
+++ b/EGYPIZZA.cpp
@@ -1,92 +1,24 @@
-/*
-USER: zobayer
-TASK: EGYPIZZA
-ALGO: ad-hoc
-*/
-
-#include <cassert>
-#include <cctype>
-#include <cmath>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
 #include <iostream>
-#include <sstream>
-#include <iomanip>
-#include <string>
-#include <vector>
-#include <deque>
-#include <list>
-#include <set>
-#include <map>
-#include <bitset>
-#include <stack>
-#include <queue>
-#include <algorithm>
-#include <functional>
-#include <iterator>
-#include <numeric>
-#include <utility>
-using namespace std;
-
-#define READ(f) freopen(f, "r", stdin)
-#define WRITE(f) freopen(f, "w", stdout)
-#define ALL(c) c.begin(), c.end()
-#define PB(x) push_back(x)
-#define UB(s, e, x) upper_bound(s, e, x)
-#define LB(s, e, x) lower_bound(s, e, x)
-#define REV(s, e) reverse(s, e);
-#define SZ(c) c.size()
-#define SET(p) memset(p, -1, sizeof(p))
-#define CLR(p) memset(p, 0, sizeof(p))
-#define MEM(p, v) memset(p, v, sizeof(p))
-#define i64 long long
-#define ff first
-#define ss second
-#define DEBUG if(0)
-
-template< class T > T sq(T x) { return x * x; }
-template< class T > T abs(T n) { return (n < 0 ? -n : n); }
-template< class T > T max(T a, T b) { return (!(a < b) ? a : b); }
-template< class T > T min(T a, T b) { return (a < b ? a : b); }
-template< class T > T gcd(T a, T b) { return (b != 0 ? gcd<T>(b, a%b) : a); }
-template< class T > T lcm(T a, T b) { return (a / gcd<T>(a, b) * b); }
-template< class T > T mod(T a, T b) { return (a < b ? a : a % b); }
-template< class T > bool inside(T a, T b, T c) { return a<=b && b<=c; }
-template< class T > void setmax(T &a, T b) { if(a < b) a = b; }
-template< class T > void setmin(T &a, T b) { if(b < a) a = b; }
-
-const int MAX = 10001;
+#include<cstring>
+
+using namespace std;
+
+int main()
+{
+    int n;
+    cin>>n;
+    char *a = new char[n*3+1];
+    char b[3];
+    for(int i=0; i<n; i++)
+    {
+            cin>>b;
+            strcpy(&a[i*3],b);
+    }
+    for(int i=0; i<n; i++)
+    {
+            cout<<a[i*3];
+    }
 
-int main() {
-	DEBUG READ("in.txt");
-	DEBUG WRITE("out.txt");
-	
-	int n, i, cnt14 = 0, cnt12 = 0, cnt34 = 0, ans = 1, a, b;
-	
-	scanf("%d", &n);
-	for(i = 0; i < n; i++) {
-		scanf("%d/%d", &a, &b);
-		switch(a+b) {
-			case 3: cnt12++; break;
-			case 5: cnt14++; break;
-			case 7: cnt34++; break;
-		}
-	}	
-	
-	// for 3/4
-	ans += cnt34;
-	cnt14 -= cnt34;
-	setmax(cnt14, 0);
-	
-	// for 1/2
-	ans += (cnt12 >> 1);
-	cnt12 &= 1;
-	if(cnt12) ans++, cnt14 -= 2, setmax(cnt14, 0);
-	
-	// for 1/4
-	ans += ((cnt14 + 3) >> 2);
-	
-	printf("%d\n", ans);
-	return 0;
-}
+
+    return 0;
+}
diff --git a/FCTRL2.cpp b/FCTRL2.cpp
old mode 100644
new mode 100755
index 5a10923..9ca7427
--- a/FCTRL2.cpp
+++ b/FCTRL2.cpp
@@ -1,49 +1,36 @@
-/*
-USER: zobayer
-TASK: FCTRL2
-ALGO: math, big integer
-*/
-
-#include <cstdio>
-#include <cstring>
-
-#define MAXDIGIT 101
-#define MAXLENGTH 159
-
-using namespace std;
-
-char factorial[MAXDIGIT][MAXLENGTH];
-
-void multiply(int k)
-{
-	int carry = 0, sum, i = 0, len = strlen(factorial[k-1]);
-	while(i<len)
-	{
-		sum = carry + (factorial[k-1][i] - '0') * k;
-		factorial[k][i++] = (sum % 10) + '0';
-		carry = sum/10;
-	}
-	while(carry>0)
-	{
-		factorial[k][i++] = (carry%10) + '0';
-		carry/=10;
-	}
-}
-
+#include<stdio.h>
 int main()
 {
-	int n, k, len, t;
-	factorial[0][0]='1'; factorial[1][0]='1';
-	for(k=2;k<MAXDIGIT;k++)
-		multiply(k);
-	for(scanf("%d",&t);t;t--)
-	{
-		scanf("%d",&n);
-	 	len = strlen(factorial[n]);
-	 	for(k=len-1;k>=0;k--)
-			printf("%c",factorial[n][k]);
-		printf("\n");
-	}
-	return 0;
-}
+    int t;
+    int a[200]; //array will have the capacity to store 200 digits.
+    int n,i,j,temp,m,x;
 
+    scanf("%d",&t);
+    while(t--)
+    {
+       scanf("%d",&n);
+       a[0]=1;  //initializes array with only 1 digit, the digit 1.
+       m=1;    // initializes digit counter
+
+       temp = 0; //Initializes carry variable to 0.
+       for(i=1;i<=n;i++)
+       {
+            for(j=0;j<m;j++)
+            {
+               x = a[j]*i+temp; //x contains the digit by digit product
+               a[j]=x%10; //Contains the digit to store in position j
+               temp = x/10; //Contains the carry value that will be stored on later indexes
+            }
+             while(temp>0) //while loop that will store the carry value on array.
+             {
+               a[m]=temp%10;
+               temp = temp/10;
+               m++; // increments digit counter
+             }
+      }
+              for(i=m-1;i>=0;i--) //printing answer
+              printf("%d",a[i]);
+              printf("\n");
+    }
+    return 0;
+}