#Codeforces

[@watch2-grow]

Thank you bhaiya for your efforts

[@freebookstore3242]

I'm dumb I couldn't find this .. thanks for good explanation

[@kaushiksen2190]

Wonderful explanation bhaiya. Could not solve it during the contest though. Please continue to post more content and video solutions. Thanks

[@parikhitkkkk6569]

I still not understand 😭

[@ShivamThakur-pl7ew]

I also think this problem like you explain but after many wrong submission's.

[@huangshengqian]

why?
int main()
{
int t;
cin >> t;
while (t--)
{
int n;
cin >> n;
for (int i = 0; i < n;i++)
{
if (i%2==1)
{
cout