#include<iostream>
using namespace std;
int main()
{
int n,oddsum=0,evensum=0;
cout<<"\nEnter the nuumber:";
cin>>n;
for(int i=1;i<=n;i++)
{
if(i%2==0)
evensum=evensum+i;
else
oddsum=oddsum+i;
}
cout<<"sum of odd numbers:"<<oddsum<<"\n";
cout<<"sum of even numbers:"<<evensum<<"\n";
cout<<endl;
return 0;
}
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