Submission #257460

#	Time	Username	Problem	Language	Result	Execution time	Memory
257460		dolphingarlic	Guess the number (BOI20_guess)	Cpython 3	100 / 100	32 ms	3564 KiB

Guess

import sys
n = int(input())
l = 1
r = n
while True:
  mid = (l + r) // 2
  print(f'? {mid}')
  sys.stdout.flush()
  res = int(input())
  if res == -1:
    l = mid + 1
  elif res == 1:
    r = mid - 1
  else:
    print(f'= {mid}')
    sys.stdout.flush()
    break

• Subtask 1: 29 / 29
• Subtask 2: 71 / 71