#include<stdio.h> int main() { int n,k,l,i; while(scanf("%d%d%d",&n,&k,&l)!=EOF) { if(n==0&&k==0&&l==0) break; for(i=2;i<n;i++) { if(k-k/2+k>l) break; k=k-k/2+k; } printf("%d\n",k); } return 0; }
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