CodeChef --- The Attack of Knight

Bismillahir Rahmanir Rahim
///Author: Tanvir Ahmmad
///CSE,Islamic University,Bangladesh

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<string>
#include<cstring>
#include<sstream>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<vector>
#include<iterator>
#include <functional> ///sort(arr,arr+n,greater<int>()) for decrement of array
/*every external angle sum=360 degree
  angle find using polygon hand(n) ((n-2)*180)/n*/
///Floor[Log(b)  N] + 1 = the number of digits when any number is represented in base b
using namespace std;
typedef long long ll;

ll dx[] = { -2, -1, 1, 2, -2, -1, 1, 2 };
ll dy[] = { -1, -2, -2, -1, 1, 2, 2, 1 };

int main()
{
    ll tst,a,b,c,d;
    cin>>tst;
    while(tst--)
    {
        ll cnt=0,cnt1=0,flag=0;
        cin>>a>>b>>c>>d;
        for(ll i=1; i<=8 ; i++)
        {
            for(ll j=1; j<=8; j++)
            {
                cnt=0,cnt1=0;
                for(ll k=0; k<8; k++)
                {
                    ll alpha=i+dx[k];
                    ll beta=j+dy[k];
                    if(alpha==a && beta==b)
                        cnt=1;
                    if(alpha==c && beta==d)
                        cnt1=1;
                }
                if(cnt && cnt1) flag=1;
            }
        }
        if(flag)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }
    return 0;
}
///Alhamdulillah

Problem Link: https://www.codechef.com/START44C/problems/JOGGING

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