Đúng là máy trên này nhanh hơn trên spoj thật, sub thử ra thế này đây

Test case #1: OK [0.000s, 376K] (5/5)
Test case #2: OK [0.000s, 376K] (5/5)
Test case #3: OK [0.000s, 376K] (5/5)
Test case #4: OK [0.000s, 376K] (5/5)
Test case #5: OK [0.001s, 376K] (5/5)
Test case #6: OK [0.000s, 376K] (5/5)
Test case #7: OK [0.000s, 376K] (5/5)
Test case #8: OK [0.000s, 376K] (5/5)
Test case #9: OK [0.000s, 376K] (5/5)
Test case #10: OK [0.000s, 376K] (5/5)
Test case #11: OK [0.004s, 376K] (5/5)
Test case #12: OK [0.000s, 376K] (5/5)
Test case #13: OK [0.000s, 376K] (5/5)
Test case #14: OK [0.000s, 376K] (5/5)
Test case #15: OK [0.002s, 376K] (5/5)
Test case #16: OK [0.000s, 376K] (5/5)
Test case #17: OK [0.000s, 376K] (5/5)
Test case #18: OK [0.000s, 376K] (5/5)
Test case #19: OK [0.000s, 376K] (5/5)
Test case #20: OK [0.000s, 376K] (5/5)