889162. Check if two strings are same or not
Easy
Here is the detailed Markdown blog post for the problem "Check if two strings are same or not":
Check if two strings are same or not
Summary
This problem involves checking whether two given strings are identical or not. The key concept involved here is string comparison, which requires comparing each character of both strings and determining if they match.
Detailed Explanation
To solve this problem, we can use a simple algorithm that compares each character of the two strings. Here's a step-by-step breakdown:
- Initialize a variable
sametotrue. - Loop through each character of both strings.
- Compare each pair of characters. If they don't match, set
sametofalseand break out of the loop. - After looping through all characters, if
sameis stilltrue, return that the two strings are identical.
Here's a simple ASCII art diagram to illustrate this:
String 1: "hello"
String 2: "hello"
Loop through each character:
h -> h (match)
e -> e (match)
l -> l (match)
l -> l (match)
o -> o (match)
same = true
Time complexity for this algorithm is O(n), where n is the length of the strings, as we need to compare each character once. Space complexity is O(1), as we only require a single variable to store the result.
Optimized Solutions
Java
public boolean areStringsSame(String s1, String s2) {
if (s1.length() != s2.length()) {
return false;
}
for (int i = 0; i < s1.length(); i++) {
if (s1.charAt(i) != s2.charAt(i)) {
return false;
}
}
return true;
}