My issue
it is saying my solution failed in following input:1
2 5
my output:2 3
how can this be incorrect
there are equal number of odds and evens and sum is also 5
My code
#include <bits/stdc++.h>
using namespace std;
int main()
{
long t;
cin>>t;
while(t--)
{
long n;
cin>>n;
long k;
cin>>k;
long sum=0;
for(long i=1;i<=n;i++)
{
sum+=i;
}
if(n%2==1)
cout<<-1<<endl;
else if(k>=sum)
{
if(k%2==0&&((n/2)%2==1))
cout<<-1<<endl;
else if(k%2==1&&((n/2)%2==0))
cout<<-1<<endl;
else{
long sum1=0;
for(long i=1;i<=n-2;i++)
{
cout<<i<<" ";
sum1+=i;
}
cout<<(k-sum1)/2<<" "<<((k-sum1)/2)+1<<endl;}
}
else
cout<<-1<<endl;
}
return 0;
}
Problem Link: SUMARRAY Problem - CodeChef
