diff --git a/2.c b/2.c
new file mode 100644
index 0000000..1151612
--- /dev/null
+++ b/2.c
@@ -0,0 +1,39 @@
+#include<stdio.h>
+int main()
+{
+long long int N;
+long long int i,j,k,l,sum=1;
+long long int count[1000001];
+scanf("%lld",&N);
+long long int ip[N];
+
+for(i=0;i<N;i++)   
+	scanf("%lld",&ip[i]);
+for(k=0;k<2;k++)
+{
+	count[ip[k]]=1;
+}
+
+i=0;
+j=1;
+while(j<N)
+{	
+	 if(count[ip[j]]>=2)
+	 {
+		
+		count[ip[i]]--;
+		i++;
+	 }
+	 else
+	 {
+			
+			l=j-i+1;
+			sum+=((l*(l+1))/2);
+			j++;
+			if (j<N)
+			count[ip[j]]++;
+			}
+}
+printf("%lld\n",sum);
+	return 0;
+}