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终于不打表AC,282ms,放出代码,求更快的解法……#include <stdio.h> /*#include <time.h>*/ #include <string.h> int main() { int arr[15]; memset(arr,0,15*sizeof(int)); while(1) { int k,m=0; scanf("%d",&k); if(k==0)break; if(arr[k]==0) { while(1) { m++; int bad=k*2,now=0; while(1) { now=(now+m-1)%bad+1; if(now>k) { bad--; now--; } else break; } if(bad==k){arr[k]=m;break;} } } printf("%d\n",arr[k]); } /*printf("%f\n",(float)clock()/CLOCKS_PER_SEC);*/ } Followed by:
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