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#define reg register #define fok (ch!=EOF) #define sep (ch==' '||ch=='n'||ch=='t') #define dsep !isdigit(ch) #define neq(a,b) ((a)-(b)>1e-6) using namespace std; struct FastIO{ char rbuf[1000002],wbuf[1000002],b,*p1,*p2; int rs,ws,S; FastIO(){p1=rbuf,p2=wbuf,S=1000000,rs=1000000,ws=-1,b=1;} inline void go(){fwrite(wbuf,1,ws+1,stdout)?ws=-1:0;} inline char getch(){ return rs==S&& (p1=rbuf,rs=-1,(S=fread(rbuf,1,S+1,stdin)-1)==-1)? (b=0,EOF):(++rs,*p1++); } inline void putch(int x){ ws==1000000&& (p2=wbuf,ws=-1,fwrite(wbuf,1,1000001,stdout)),++ws,*p2++=x; } inline void puts(char str[]){ for(reg int i=0;str[i]!='
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