zp1622.cpp

一个acm题目系统会自动删除debug和release目录

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

#pragma hdrstop

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

#pragma argsused
#include <iostream.h>
int main(int argc, char* argv[])
{
  int t,l,r,i,x,n;
  while (cin>>n)
  {
    l=0;r=0;
    for (i=0;i<n;i++)
    {
      cin>>x;
      if (x==i%2) l++; else r++;
    }
    t=(l<r)?l:r;
    cout<<t<<endl;
  }
  return 0;
}
//---------------------------------------------------------------------------