[此贴子已经被作者于2016-6-22 09:25编辑过]

以下是引用w4654646在2016-6-22 14:37:35的发言：

或写下代码，我自已完善下

程序代码：

#include <stdio.h>

void foo( const char* opts, unsigned n, const unsigned elems[] )
{
    unsigned a = 0;
    unsigned b = n;
    unsigned r = 0;

    for( ; *opts; ++opts )
    {
        if( *opts == 'R' )
            ++r;
        else if( r%2 == 0 )
            ++a;
        else
            --b;
    }

    if( a > b )
        puts( "error" );
    else if( a == b )
        puts( "[]" );
    else if( r%2 == 0 )
    {
        printf( "[%d", elems[a++] );
        for( ; a!=b; ++a )
            printf( ",%u", elems[a] );
        puts( "]" );
    }
    else
    {
        printf( "[%d", elems[--b] );
        for( ; a!=b; --b )
            printf( ",%u", elems[b-1] );
        puts( "]" );
    }
}

int main( void )
{
    unsigned count;
    scanf( "%u", &count );
    while( count-- )
    {
        char opts[100001];
        unsigned elems[100001];
        unsigned n;

        scanf( "%s", opts );
        scanf( "%u %*c", &n );
        for( unsigned i=0; i!=n; ++i )
            scanf( "%u %*c", elems+i );

        foo( opts, n, elems );
    }

    return 0;
}