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Luck Balance Hacker Rank
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| function luckBalance(k, contests) { | |
| return contests.sort(([a,x],[b,y])=>y-x || b-a) | |
| .reduce((memo,[l,t],key)=>{ | |
| memo += t===1 && key<k? l: t===1 && key>=k?-l:l | |
| return memo; | |
| },0) | |
| } |
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