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Re:能不能告诉我区别下？In Reply To:能不能告诉我区别下？ Posted by:shock at 2009-08-05 17:37:33 > 为什么我用
> memset( mat, 1, sizeof( mat ) );
> for( i=0; i<m; i++ )
> {
> scanf("%d%d",&s,&t);
> s--, t--;
> mat[s][t] = 0;
> }
> 是AC
> 但是用：
> memset( mat, 1, sizeof( mat ) );
> for( i=0; i<m; i++ )
> {
> scanf("%d%d",&s,&t);
> s--, t--;
> mat[s][t] = mat[t][s] = 0;
> }
> 是WA ？？？
> 有什么实质性的区别吗？
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