#Author:Mr.Pan_学狂
#Finish_time:2020/11/22/22:34
import hashlib
import time
def find_gold():#参数D是难度系数
  x = 0#算力初始值
  Diffcult_number = str(input('请输入难度系数：'))
  print('开始挖矿!!')
  while True:
    x += 1
    string = 'hello'
    start_string = str(x)
    combine_string = start_string + string#字符串拼接
    h = hashlib.sha256()#采用sha256加密
    h.update(combine_string.encode('utf-8'))#utf-8编码后哈希加密
    gold_hash = h.hexdigest()
    #print(gold_hash)
    startTime = time.perf_counter()
    if gold_hash[0:len(Diffcult_number)] == Diffcult_number:#对比哈希值的x位与难度系数是否相同，x为难度系数
      print('算力:{}'.format(x), '用时:{}'.format(startTime))
      print('哈希值:%s' % gold_hash)#占位符
      print('挖矿成功！！')
      break
    elif gold_hash[0:len(Diffcult_number)] != Diffcult_number:#哈希值前x位与难度系数不相同
      print('算力:{}'.format(x),'用时:{}'.format(startTime))
      print('哈希值:%s' % gold_hash)
      print('没有挖到！！')
      print()
      continue
if __name__ == '__main__':#主函数,调用函数，程序出口。
  find_gold()