rank userid   106 107 sum 108 109 sum max
     1  isc07211  50   0  50  50  50 100 100
     1  zhuwenbi  50  50 100  50  50 100 100
     1  zhuyi     50  50 100  50   0  50 100
     4  akashkum   0   0   0  50   0  50  50
     4  chenting  50   0  50  50   0  50  50
     4  kohchung  50   0  50  50   0  50  50
     4  phanthix   0  50  50  50   0  50  50
     4  wangying  50   0  50  50   0  50  50
     4  zhangxin   0  50  50  50   0  50  50
     4  zhoujing  50   0  50  50   0  50  50
    11  johansya   0   0   0   0   0   0   0
    11  jonathan   0   0   0   0   0   0   0
    11  lohyeong   0   0   0   0   0   0   0
    11  ouyongji   0   0   0   0   0   0   0
    11  trantuan   0   0   0   0   0   0   0
    11  trianaku   0   0   0   0   0   0   0