Untitled

function SearchStack(stack, item) {
    var count = 0;
    let result = [];
    for (i = 0; i < stack.length; i++) {
        if (stack[i] != item) {
            result.push(stack[i]);
        } else if (stack[i] == item) {
            count += 1;
        }
    }
    if (count < 1) {
        return false;
        // return console.log(false);
    } else {
        return result;
        // return console.log(result);
    }
}


CheckGrid(arr)
    // Q6

// the input is going to be 4*4 array. 
// so that i can simply itereate ?
// and every 2*2 array. I can take the values in one stack
// then it can have same logical flow as q5
function CheckGrid(puzzle) {
    var st = [];
    let k = 1;

    for (i = 0; i < 3; i++) {
        console.log("check value i", i);
        for (j = 0; j < 3; j++) {
            console.log("check value i", i);
            console.log("check value j", j);
            st.push(puzzle[i][j]);
            st.push(puzzle[i][j + 1]);
            st.push(puzzle[i + 1][j]);
            st.push(puzzle[i + 1][j + 1]);
            for (k = 1; k <= 4; k++) {
                if (SearchStack(st, k) === false) {
                    return console.log('false')
                } else {
                    SearchStack(st, k);
                }
            }
            st = [];
        }
    }
    return console.log('true')
}