31 lines
547 B
JavaScript
31 lines
547 B
JavaScript
'use strict';
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let _ = require('../utils'),
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mergeSort = require('../sort/merge');
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let args = _.args.numbers(),
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set = args.slice(0, -1),
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key = args[args.length-1];
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function findPair(arr, x) {
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mergeSort(arr, 0, arr.length);
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let i = 0,
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j = arr.length-1;
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for(let x = 0, len = arr.length/2; x < len; x++) {
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let sum = arr[i] + arr[j];
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if(sum === x) return true;
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if(sum > x) j--;
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if(sum < x) i++;
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}
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return false;
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}
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if(require.main === module) {
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_.log(findPair(set, key));
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}
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module.exports = findPair;
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