题目：HouYi'ssecret   include<stdio.h> include<math.h> include<map> include<iostream> include<string.h> usingnamespacestd; constdoubleeps=1e-6; map<longlong,int>mp; structNode { intx,y; }node[50]; doubledis(Nodea,Nodeb) { returnsqrt((a.x-b.x)(a.x-b.x)+(a.y-b....

题目：Lastnon-zeroDigitinN!   include<stdio.h> include<string.h> definemaxn10001 constintmod[20]={1,1,2,6,4,2,2,4,2,8,4,4,8,4,6,8,8,6,8,2}; intlastdigit(charbuf[]) { intlen=strlen(buf),a[maxn],i,c,ret=1; if(len1)returnmod[buf[0]-'0']; for(i=0;i<len;i) a[i]=buf[len-1-i]-'0'...