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Sum Of Series

 Solution :

#include <stdio.h>

int main()

{

  int i,n,s=0,j,sum;

  scanf("%d",&n);

  for(i=1;i<=n;i++)

  {

    sum=0;

    for (j=1;j<=i;j++)

    sum=sum+j;

  s=s+sum;

}

  printf("%d\n",s);

return 0;
}

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