rank userid   110 111 112 sum
     1  zhuyi     50  50  15 115
     2  isc07211  50  50   0 100
     2  lohyeong  50  50   0 100
     2  phanthix  50  50   0 100
     2  zhangxin  50  50   0 100
     6  akashkum   0  50  15  65
     7  chenting   0  50   0  50
     7  trantuan   0  50   0  50
     7  wangying   0  50   0  50
    10  kohchung   0  35   0  35
    11  zhuwenbi  15  10   0  25
    12  johansya   0   0   0   0
    12  jonathan   0   0   0   0
    12  ouyongji   0   0   0   0
    12  trianaku   0   0   0   0
    12  zhoujing   0   0   0   0