def record_conflict(self, assignment, var, val, delta):
        "Record conflicts caused by addition or deletion of a Queen."
        n = len(self.vars)
        self.rows[val] += delta
        self.downs[var + val] += delta
        self.ups[var - val + n - 1] += delta
def record_conflict(self, assignment, var, val, delta):
        "Record conflicts caused by addition or deletion of a Queen."
        n = len(self.vars)
        self.rows[val] += delta
        self.downs[var + val] += delta
        self.ups[var - val + n - 1] += delta
def record_conflict ( self , assignment , var , val , delta ) : n = len ( self . vars ) self . rows [ val ] += delta self . downs [ var + val ] += delta self . ups [ var - val + n - 1 ] += delta
Record conflicts caused by addition or deletion of a Queen.
Record conflicts caused by addition or deletion of a Queen .