zp1278_1.cpp

一个acm题目系统会自动删除debug和release目录

//---------------------------------------------------------------------------

#pragma hdrstop

//---------------------------------------------------------------------------

#pragma argsused
#include <iostream>
using namespace std;
int a[10000000];
int main(int argc, char* argv[])
{
  int z,i,l,m,mb,p,k,j,f,g,s,t=1;
  cin>>z>>i>>m>>l;
  while (z || l || i ||m)
  {
    z%=m;
    l%=m; i%=m;
    p=(l*z-l+i)%m;
    mb=m;
    while (p%mb)
    {
      g=p; p=mb; mb=g%mb;
    }
    m/=mb;

    f=1;g=1;
    s=1;
    a[1]=1;
    while (f)
    {
      g*=z;
      g%=m;
      f+=g;
      f%=m;
      s++;
      a[s]=f;
      if (s%2)
      {
        k=0;
        for (j=1;j<=s/2;j++)
          if (a[j]!=a[j+s/2])
          { k=1;break; }
        if (!k)
        { s/=2;break; }
      }
    }
    cout<<"Case "<<t<<": "<<s<<endl;

    cin>>z>>i>>m>>l;
    t++;
  }
  return 0;
}
//---------------------------------------------------------------------------