A. Little Nikita

C++Java

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define ulli unsigned long long int
#define li long int

void solve(int n, int m)
{
    if (n < m || (n - m) % 2 == 1)
        cout << "No" << endl;
    else
        cout << "Yes" << endl;
}

int main()
{
    int t;
    cin >> t;

    while (t-- > 0)
    {
        int n, m;
        cin >> n >> m;
        solve(n, m);
    }
    return 0;
}

import java.util.*;
import java.io.*;

public class Main {
    public static void solve(int n, int m) {
        if (n < m || (n - m) % 2 == 1)
            System.out.println("No");
        else 
            System.out.println("Yes");
    }

    public static void main(String[] args) {
        FastReader sc = new FastReader();
        int t = sc.nextInt();
        while (t-- > 0) {
            int n = sc.nextInt();
            int m = sc.nextInt();
            solve(n, m);
        }
    }
}

• Time Complexity : O(t) where t is number of testcases
• Space Complexity : O(1)