WA on last Test Case for SUMARRAY problem

help
,
1

Problem Link: SUMARRAY Problem - CodeChef

My Solution

void solve(){
    ll n, k;
    cin >> n >> k;

    ll nb2 = n/2;

    if((nb2%2)!=(k%2)) {cout << "-1\n"; return;}

    vector<ll> v(nb2, 3);

    k-=nb2*3;

    if(k<0) {cout << "-1\n"; return;}

    ll kb2 = k/2;
    ll q = kb2/nb2;

    ll r = kb2%nb2;

    if(r>0 && 5+2*q>1e5) {cout << "-1\n"; return;}
    if(r==0 && 3+2*q>1e5) {cout << "-1\n"; return;}

    fr(i,0,nb2) v[i]+=2*q;

    fr(i,0,r) v[i]+=2;

    fr(i,0,nb2){
        cout << v[i]/2 << " " << v[i]/2 + 1 << " ";
    }

    cout << endl;
}

Could anyone please point out the issue here?
Getting WA on last Test Case …