#include <stdio.h> main(){ int t; while(scanf("%d",&t)!=EOF){ if(t == 0) break; int s = 0,i; if(t==1||t==2) printf("%d\n",t); else{ for(i =2;i<=t;i++) s =(s+3)%i; printf("%d\n",s+1); } } return 0; }
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