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vlas-ilya/isCorrectParentheses

Created October 9, 2015 12:20
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isCorrectParentheses
var isCorrectParentheses = function (str) {
var i = 0;
for (var ch = 0; ch < str.length; ch++) {
if (str[ch] === '(') i++;
if (str[ch] === ')') i--;
if (i < 0) return false;
}
if (i !== 0) return false;
return true;
}
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