diff --git a/2.c b/2.c
new file mode 100644
index 0000000..d750a3b
--- /dev/null
+++ b/2.c
@@ -0,0 +1,43 @@
+#include<stdio.h>
+int b[25];
+int main()
+{
+	unsigned long long int i,j,k,n,sum;
+	int flag=0;
+	scanf("%llu%llu",&n,&k);
+unsigned long long int a[n];
+	
+
+	for(i=0;i<n;i++)
+	{
+		scanf("%llu",&a[i]);
+		
+	}
+
+	for(i=1;i<(1<<n);i++)
+	{
+		sum=0;
+		for(j=0;j<n;j++)
+		{
+			if(i&(1<<j)==(1<<j))
+			{
+				sum=sum+a[j];
+			}
+		
+			if(sum==k)
+			{
+				flag=1;
+				break;
+			}
+
+		}
+		
+		if(flag==1)
+				break;
+	}
+if(flag==1)
+{printf("yes");}
+else
+{printf("no");}
+return 0;
+}
diff --git a/5.c b/5.c
new file mode 100644
index 0000000..7b2903d
--- /dev/null
+++ b/5.c
@@ -0,0 +1,51 @@
+#include<stdio.h>
+int main()
+{
+
+	long long int n,v,sum,count,j,i,least,x;
+	int t,p;
+	scanf("%d",&t);
+
+	for(p=1;p<=t;p++)
+	{
+		scanf("%lld%lld",&n,&v);
+                long long int a[n];
+		
+		for(i=0;i<n;i++)
+		{scanf("%lld",&a[i]);}
+
+		for(i=0;i<n-1;i++)
+		{least=i;
+			for(j=i+1;j<n;j++)
+			{
+				if(a[j] < a[least])
+				{least=j;}
+			}
+			x=a[i];
+			a[i]=a[least];
+			a[least]=x;
+		}
+
+		sum=0;
+                count=0;
+               int flag=0;
+		for(i=n-1;i>=0;i--)
+		{
+			sum=sum + a[i];
+			count++;
+			if(sum >= v)
+			{  flag=1;
+                           break;}
+                          
+                       
+		}
+               
+                 if(flag==0)
+                 {printf("-1\n");}
+              
+                  else if (flag==1)
+	          {printf("%lld\n",count);}
+
+	}
+
+}
diff --git a/7.c b/7.c
new file mode 100644
index 0000000..1532e8a
--- /dev/null
+++ b/7.c
@@ -0,0 +1,51 @@
+#include<stdio.h>
+long long int c[1000001];
+int main()
+{
+         long long int n;
+        scanf("%lld",&n);
+         long long int a[n];
+          long long int max,i,sumfreq,sum,median,mode;
+          long long int  mean;
+        
+         scanf("%lld",&a[0]);
+        max=c[a[0]];
+        c[a[0]]++ ;
+        sumfreq=0;
+        sum=a[0];
+        for(i=1;i<n; i++)
+        {
+                scanf("%lld",&a[i]);
+
+                c[a[i]]++;
+
+                sum = sum + a[i];
+                  
+
+            
+                if(c[a[i]] > max)
+                {
+                        max=c[a[i]];
+                        mode=a[i];
+                }
+
+         
+
+        }
+        
+
+        for(i=0;i<=1000000;i++)
+          {
+            sumfreq=sumfreq+c[i];
+            if(sumfreq>=(n+1)/2)
+            {break;}
+            
+          }
+
+          median=i;       
+
+          mean=(sum/n);
+            printf("%lld %lld %lld\n",mean,median,mode);
+return 0 ;
+}
+
diff --git a/c.c b/c.c
new file mode 100644
index 0000000..3ef85f5
--- /dev/null
+++ b/c.c
@@ -0,0 +1,5 @@
+#include<stdio.h>
+int main()
+{
+	printf("hello world");
+}