rank userid   123 124 sum
     1  zhangxin  50  50 100
     1  zhuyi     50  50 100
     3  zhuwenbi  40  50  90
     4  akashkum  35  50  85
     5  chenting  35  35  70
     5  isc07211  35  35  70
     5  kohchung  35  35  70
     5  lohyeong  35  35  70
     5  trantuan  40  30  70
     5  trianaku  35  35  70
     5  wangying  35  35  70
     5  zhoujing  35  35  70
    13  phanthix  28  35  63
    14  jonathan   0  35  35
    15  johansya   7   0   7
    16  ouyongji   0   0   0