Computing winning committees of size 3
with the Proportional Approval Voting (PAV) rule
given the following profile with 6 voters and 5 candidates:
 voter 0:   {0, 1, 2},
 voter 1:   {0, 1},
 voter 2:   {0, 1},
 voter 3:   {1, 2},
 voter 4:   {3, 4},
 voter 5:   {3, 4}
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Proportional Approval Voting (PAV)
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2 winning committees:
 {0, 1, 3}
 {0, 1, 4}

