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帮忙看看啊,VC运行成功了,但就是WA啊!

Posted by qichao at 2009-07-21 13:00:03 on Problem 1007
#include<stdio.h>
#include<string.h>

int main()
{
	char dna[100][51],tem[51];
	int i,j,k,m,n,a[51]={0},tem1;
	scanf("%d %d",&n,&m);
	getchar();
	for(k=0;k<m;k++)
	{
		gets(dna[k]);
		for(i=0;i<n-1;i++)
		{
			for(j=i+1;j<n;j++)
			{
				if(dna[k][i]>dna[k][j])
					a[k]++;
			}
		}	
	}
	for(i=0;i<m-1;i++)
	{		
		for(j=i+1;j<m;j++)
		{
			if(a[i]>a[j])
			{
				tem1=a[i];
				a[i]=a[j];
				a[j]=tem1;
				strcpy(tem,dna[i]);
				strcpy(dna[i],dna[j]);
				strcpy(dna[j],tem);
			}
		}
	}
	for(i=0;i<m;i++)
		puts(dna[i]);
}

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