在前面加入这个
short int long float double bool char string void
array vector stack queue auto const operator
class public private static friend extern
sizeof new delete return cout cin memset malloc
relloc size length memset malloc relloc size length
for while if else switch case continue break system
endl reverse sort swap substr begin end iterator
namespace include define NULL nullptr exit equals
index col row arr err left right ans res vec que sta
state flag ch str max min default charray std
maxn minn INT_MAX INT_MIN push_back insert
