Untitled

if __name__ == "__main__":
    
    tt = int(input())
    
    for _ in range(0, tt):
        
        N = int(input())
        
        alice_score, bob_score = 0, 0
        die1, die2 = 0, 0
        state = 0
        score_equal = False # check if score has been equal yet
 
        # state 0 | when alice has die 1 and bob has die 2
        # state 1 | when alice has die 2 and bob has die 1
        
        for roound in range(0, N):
            
            # alice and bob score in each round
            x, y = map(int, input().split())
            
            alice_score += x 
            bob_score += y 
            
            if state == 0:
                
                die1 += x
                die2 += y
                
            if state == 1:
                
                die1 += y 
                die2 += x
            
            
            if alice_score == bob_score and score_equal == False:
                
                # Both of there scores is equal
                # Reset die scores to 0
                score_equal = True
                die1 = 0
                die2 = 0
            
            if alice_score != bob_score and score_equal == True:
                
                continue
            
            if alice_score != bob_score and score_equal == False:
                
                if state == 1:
                    
                    state = 0
                else:
                    
                    state = 1
            
        if die1 > die2:
            print(1)
        else:
            print(2)