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总算AC了,改错改了半天,冒着被大家骂的危险,把代码贴在这里!

Posted by 810974380 at 2009-07-29 17:44:00 on Problem 2039

互相学习学习!欢迎交流!

#include<iostream>
#include<cstring>
using namespace std;
int main()
{ int n,length,m,b[210];char c,str[210];
  while(cin>>n)
  {if(n==0) break;
   cin>>str;
   length=strlen(str);
   m=length/n;
   for(int w=0;w<length;w++)
	   b[w]=0;
   for(int i=0;i<length;i++)
	 if(i/n%2!=0&&b[i]==0)
	 {c=str[i];str[i]=str[(n-i%n-1-i%n+i)];str[(n-i%n-1-i%n+i)]=c;
	  b[i]=1;b[(n-i%n-1-i%n+i)]=1;
	 }
	 for(int j=0;j<n;j++)
	  for(int k=0;k<length;k++)
	  if(k%n==j)  cout<<str[k];
	  cout<<endl; 
  }
  return 0;
}

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