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pack 1/task 3514 #9

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sevaTechoPark
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var tmpArr = [];
var rezultArr = [];

for ( var i = 0; i < arr.length - 1; i++){

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последний элемент вообще не будет обрабатываться, если он изначально будет уникален

var index = i + 1; // индекс совпадающего элемента

while ( true ){
index = arr.indexOf(arr[i],index);

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каждый раз пробегаешь по массиву, попробуй уменьшить число пробегов (может помочь forEach для перебора и some для поиска первого нечетного)

кстати, тебе нужно вывести не все нечетные элементы, а только один

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