lijie201602 2017-09-26 13:47:12
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#include<cstdio>
long long m=2,n;
int main()
{
scanf("%lld",&n);
while(1)
{
m=m*9-8;
if(m>n) { printf("181818181818"); return 0; }
m=m*2-1;
if(m>n) { printf("ZBT"); return 0; }
}
return 0;
}