Donald Duck and Mickey Mouse run a 10,000-meter race. Mickey Mouse's speed is 125 meters per minute, and Donald Duck's speed is 100 meters per minute. Donald Duck holds an electronic remote control that forces Mickey Mouse to go backwards. Through this remote control, when the nth command is issued, Mickey Mouse will go backwards at n*10% of the original speed for one minute, and then continue at the original speed. Going forward, if Donald Duck wants to win the game, what is the minimum number of commands he must send through the remote?
唐老鸭与米老鼠进行一万米赛跑，米老鼠的速度是每分钟125米，唐老鸭的速度是每分钟100米．唐老鸭手中掌握着一种迫使米老鼠倒退的电子遥控器，通过这种遥控器发出第n次指令，米老鼠就以原速度的n*10%倒退一分钟，然后再按原来的速度继续前进，如果唐老鸭想在比赛中获胜，那么它通过遥控器发出指令的次数至少应是多少次？
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