KSzsh

ÕªÒª£º ÌâÄ¿Á´½Ó ÌâÄ¿ÃèÊö£º The gardener Kazimir Kazimirovich has an array of $n$ integers $c_1,c_2,¡­,c_n$. He wants to check if there are two different subsequences $ ÔĶÁÈ«ÎÄ

ÕªÒª£º ÌâÄ¿Á´½Ó ÌâÄ¿ÃèÊö£º Cirno_9baka has a paper tape with $n$ cells in a row on it. As he thinks that the blank paper tape is too dull, he wants to paint these cel ÔĶÁÈ«ÎÄ