its dictionary means shorted ordered arry.
let low = 1; and high= const.(10^const)
Boolean isWord(String word)
{ while(low <= high)
{ mid = (low+ high)/2;
if(word = getWordAt(mid))
return true;
if( word > getWordAt(mid))
{ high = mid-1
}
else
low = mid+1;
}
}
Its a simple Binary Search Algorithm ...
who's complexity is O(log n) times.
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