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TLE的可以看下。。。

Posted by arena_zp at 2010-08-27 13:23:36 on Problem 2452 
for( ; l<r && a[l]>a[l+1]; ++l ) ;
for( ; r>l && a[r]<a[r-1]; --r );
加一个这个就可以过了。1100+MS
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