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测试都过了,但是wa!!!!

Posted by kuangwenkui at 2007-06-16 19:40:11 on Problem 1565
#include<stdio.h>
#include<string.h>
#include<math.h>
main()
{char a[100];
int i,j,len;
long sum;
   for(i=0;strcmp(a,"0")!=0;i++)
     { scanf("%s",a);
      sum=0;
      len=strlen(a);
      for(j=0;j<len;j++)
	 {sum=sum+(a[j]-'0')*(pow(2,len-j)-1);
	 }
      printf("%ld",sum);
     }
}

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