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Problem Statement
The Subarray Sum Equals K LeetCode Solution - "Subarray Sum Equals K" states that you are given an array of integers "nums" and an integer 'k', return the total number of continuous subarrays whose sum equals to 'k'.
Example:
nums = ,
k=3
2
Explanation:
There are two subarrays whose sum is 3:
- First from index 0 to 1 i.e. ,
- Second from index 2 to 2 i.e.
nums = ,
k=3
2
Explanation:
There are two subarrays whose sum is 2:
- First from index 0 to 1 i.e. ,
- Second from index 1 to 2 i.e.
Approach
Idea:
The main idea is to use a hash map to store the frequency of prefix sums.
So, we'll iterate over the array, finding how many subarrays exist whose sum equals k and ends at the current point on each iteration.
So, if the value of the prefix sum up to this point is 'prefixSum,' the next step is to determine how many prefix sums exist whose value is (prefixSum - k). It can be found in O(1) by using the hash map, which stores the frequency of prefix sums.
Code
C++ Program of Subarray Sum Equals K:
#include
using namespace std;
int subarraySum(vector &nums, int k)
{
int n = nums.size();
www.tutorialcup.com/leetcode-solutions/subarray-sum-equal...
a sidewalk engineer at MIT, and there were a slew of young geniuses standing about watching him work. :-)
This bridge illustrates one of the problems in shooting these bridges. It runs essentially east-west and the best sunlight falls on the south side. The access that I could find from that side gave me no good view of the bridge, though, so I shot from the north side, getting the best angles I could and processed for best detail, often overexposing the background.
I have the same problem with bridges that run north-south, but at least with those I may be at the bridge at a time when there is good light on the side to which I have best access.
I prefer the way that black and white shows detail on these bridges, especially the rusty or timber ones, and I have always been partial to black and white anyway, but, frequently, this exposure issue is a factor in the choice.
Hier wird Sicherheit großgeschrieben. Traut die Bahn ihren eigenen Mitarbeiter nicht? Für zwei Schlösser war kein Schlüssel auffindbar oder vorhanden...
Sitting there on my bike shooting like crazy with the camera. I took very similar picture back in March.
Studies have shown that there are lower marital satisfaction with couples that have MMORPG interactions.
Photo from kotaku.com/gaming-addiction/
Greenwood County has been ordered to expend 15 million to improve the dam so that it is eartrhquake proof. If it should break, I guess a good part of Saluda downstream would flood.
Probably built 1940.
Entered on the Laurens County side of bridge. Nice fishing spot - shame some are such trashers - trash all over the place.
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by Alfredo Fernandes
Alfi Art Production, Divar
41st Tiatr Competition A group of Kala Academy supported by TAG
13.10.2015
Tracila Gonsalves, Clothesline, sewing machine
more here
joegoauk-tiatr.blogspot.in/2015/10/41st-tiatr-competition...