My Coding Voyage

Hey guys! Here's my solution to the problem 'Weird Palindrome Making' from Codechef November Challenge 2021 Div3. Comment any suggestions if you have. #include <bits/stdc++.h> #define int long long #define pb push_back #define fi first #define se second #define pii pair < int,int > using namespace std ; int32_t main () {     int t ;     cin >> t ;     while ( t --){         int n ;         cin >> n ;         vector < int > odd ;         for ( int i = 0 ; i < n ; i ++){             int x ;             cin >> x ;             if ( x % 2 != 0 ) odd . push_back ( x );         }         int s = odd . size ();         cout << s / 2 << ' \n ' ;     }     return 0 ; }

Hola guys!! Here's my solution to the problem- 'Equal Coins' from Codechef November Challenge 2021 Div3. If you have any suggestions do comment. Happy Coding!! This question mainly tests your maths  skills. Question Link: https://www.codechef.com/NOV21C/problems/EQUALCOIN #include <bits/stdc++.h> #define int long long #define pb push_back #define fi first #define se second #define pii pair < int,int > using namespace std ; int32_t main () {     int t ;     cin >> t ;     while ( t --){         int x , y ;         cin >> x >> y ;         int sum = x + y * 2 ;         if ( sum != 0 ){             if ( x != 0 && sum % 2 == 0 ) cout << "YES" << ' \n ' ; // like 4 3             else if ( x == 0 && y % 2 == 0 ) cout << "YES" << ' \n ' ; // like 0 4             else cout << "NO" << ' \n ' ; //like 0 3         }         else