Geting wrong outputs in "1418. The Cats and the Mouse"

[yvn]

#include <iostream>
#include <math.h>
#include <algorithm>
using namespace std;
int main()
{
    long long int n, m;
    cin>>n;
    cin>>m;
    long long int k, i;
cin>>k;

long long int mx, my, c1x, c1y, c2x, c2y;

for(i = 0 ; i < k ; i ++) {
    cin>>mx;
    cin>>my;
    cin>>c1x;
    cin>>c1y;
    cin>>c2x;
    cin>>c2y;

    if(((mx - c1x) == (my - c1y) == (c2x - mx) == (c2y - my) == 1) || ((mx - c1x) == (my - c1y) == (c2x - mx) == (c2y - my) == -1)) {
        cout<<"NO"<<endl;
    } else if( ( -1*(c1x - mx) == (c1y - my) == -1*(mx - c2x) == (my - c2y) == 1 ) || ( -1*(c1x - mx) == (c1y - my) == -1*(mx - c2x) == (my - c2y) == -1 ) ) {
        cout<<"NO"<<endl;
    } else {
        cout<<"YES"<<endl;
    }
}


return 0;
}

[leppyr64]

Your logic is not correct.