balance

I have 3 teams, They have 2 players, 3 players and 7 players. There is 18 players sitting on the sidelines waiting to be assigned. Each player has their own skill level, meaning a level 1 is not going to defeat a level 10. I want to balance the teams out to 10 players each. And I want to try get all 3 teams as equal in skill as I can. But I don't want to remove the players already in a team. But I'm not sure how I would accomplish this. I'm also not sure if there is a easy answer, or if this would be expensive to compute. The skill level is a number which I already have. The teams all have a

I want to calculate account balance using raw sql without extra application logic. Transaction schema includes amount, from_account_id and to_account_id My query is SELECT SUM(tdebit.amount) - SUM(tcredit.amount) as balance FROM accounts as a INNER JOIN transactions as tdebit ON a.id = tdebit.to_account_id INNER JOIN transactions as tcredit ON a.id = tcredit.from_account_id WHERE a.id = $1 AND tdebit.succeed = true AND tcredit.succeed = true And it does not work as I expected - result is wrong, but if I join transaction only once it works correctly, for example just debit amount is ok SELECT

I'm trying to achieve a testing if a tree is AVL tree or not using prolog. I've made a height test that works for the tests I've done so far but my balancing test is still not going strong. This is my work so far: avl('Branch'(LeftBranch,RightBranch)) :- height(LeftBranch,H1), height(RightBranch,H2), abs(H1-H2) =< 1. I've based this code from an older stackoverflow code. But it doesn't work in all cases. Will include my height code. Somewhere I've made a misstake and Im sure where to find it. height(leaf(_),1). height('Branch'(LeftBranch,RightBranch,H) :- height(LeftBranch,H1), height

I am running a code to balance brackets in statement. I think i have gotten it correct but it is failing on one particular statement, i need to understand why? This is the test in particular it is failing "())(" More than the coding i think i need to fix the algo, any pointers? def balance(chars: List[Char]): Boolean = { def find(c: Char, l: List[Char], i: Int): Int={ if( l.isEmpty ) { if(c=='(') i+1 else if(c==')') i-1 else i } else if (c=='(') find(l.head, l.tail, i+1) else if(c==')') find(l.head,l.tail, i-1) else find(l.head,l.tail, i) } if(find(chars.head, chars.tail,0) ==0 ) true else

I have a table which contains the following data: ID In Out 1 100.00 0.00 2 10.00 0.00 3 0.00 70.00 4 5.00 0.00 5 0.00 60.00 6 20.00 0.00 Now I need a query which gives me the following result: ID In Out Balance 1 100.00 0.00 100.00 2 10.00 0.00 110.00 3 0.00 70.00 40.00 4 5.00 0.00 45.00 5 0.00 60.00 -15.00 6 20.00 0.00 5.00 Is it possible to do this with one query, without using a trigger or stored procedures? Short answer, yes Longer answer, you can use a variable to tally it up as it iterates down the rows, i.e. SELECT `table`.`ID`, `table`.`In`, `table`.`Out`, @Balance := @Balance +