304 North Cardinal St.
Dorchester Center, MA 02124

# Find Smallest Letter Greater Than Target LeetCode Solution

## Problem – Find Smallest Letter Greater Than Target

Given a characters array `letters` that is sorted in non-decreasing order and a character `target`, return the smallest character in the array that is larger than `target`.

Note that the letters wrap around.

• For example, if `target == 'z'` and `letters == ['a', 'b']`, the answer is `'a'`.

Example 1:

``````Input: letters = ["c","f","j"], target = "a"
Output: "c"``````

Example 2:

``````Input: letters = ["c","f","j"], target = "c"
Output: "f"``````

Example 3:

``````Input: letters = ["c","f","j"], target = "d"
Output: "f"``````

Constraints:

• `2 <= letters.length <= 104`
• `letters[i]` is a lowercase English letter.
• `letters` is sorted in non-decreasing order.
• `letters` contains at least two different characters.
• `target` is a lowercase English letter.

### Find Smallest Letter Greater Than Target LeetCode Solution in Python

``````class Solution(object):
def nextGreatestLetter(self, letters, target):
"""
:type letters: List[str]
:type target: str
:rtype: str
"""

# if the number is out of bound
if target >= letters[-1] or target < letters[0]:
return letters[0]

low = 0
high = len(letters)-1
while low <= high:
mid = (high+low)//2

if  target >= letters[mid]: # in binary search this would be only greater than
low = mid+1

if target < letters[mid]:
high = mid-1

return letters[low]
``````

### Find Smallest Letter Greater Than Target LeetCode Solution in Java

``````class Solution {
public char nextGreatestLetter(char[] a, char x) {
int n = a.length;

if (x >= a[n - 1])   x = a[0];
else    x++;

int lo = 0, hi = n - 1;
while (lo < hi) {
int mid = lo + (hi - lo) / 2;
if (a[mid] == x)    return a[mid];
if (a[mid] < x)     lo = mid + 1;
else    hi = mid;
}
return a[hi];
}
}
``````

### Find Smallest Letter Greater Than Target LeetCode Solution in C++

``````class Solution {
public:
char nextGreatestLetter(vector<char>& letters, char target) {
auto it = upper_bound(letters.begin(), letters.end(), target);
return it == letters.end() ? letters[0] : *it;
}
};
``````
##### Find Smallest Letter Greater Than Target LeetCode Solution Review:

In our experience, we suggest you solve this Find Smallest Letter Greater Than Target LeetCode Solution and gain some new skills from Professionals completely free and we assure you will be worth it.

If you are stuck anywhere between any coding problem, just visit Queslers to get the Find Smallest Letter Greater Than Target LeetCode Solution

Find on LeetCode

##### Conclusion:

I hope this Find Smallest Letter Greater Than Target LeetCode Solution would be useful for you to learn something new from this problem. If it helped you then don’t forget to bookmark our site for more Coding Solutions.

This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

Keep Learning!

More Coding Solutions >>

LeetCode Solutions

Hacker Rank Solutions

CodeChef Solutions