time complexity
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Hi I need help finding the time complexity The word case scenario for the following for loop.
![```java
/* Worst case scenario:
what is the value of count for an array of size 'n' */
public static boolean linS(int[] A, int st) {
int count = 0;
for( int i=0; i<10; i++ ) {
count++;
System.out.println(count);
}
int idx = 0;
while( idx<A.length ) {
count++;
if( A[idx] == st ) {
break;
}
idx++;
}
return idx < A.length;
}
/* How would we describe the runtime of the above code? */
```
**Explanation:**
This Java code defines a method `linS` that performs a linear search on an array `A` to find a specific integer `st`. It first executes a simple loop 10 times, incrementing and printing a `count` variable each time. It then performs a linear search on the array `A`:
1. **Initialize `count` to 0**: This variable tracks the number of operations.
2. **First loop (constant time loop)**:
- Runs 10 times regardless of the size of `A`.
- Increments the `count` and prints it.
3. **Second loop (linear search on array)**:
- Iterates through each element of `A` from the beginning.
- Increments `count` by 1 for each iteration.
- Breaks the loop if `st` is found.
**Runtime Analysis:**
- **Best Case:** O(1) if `st` is found immediately.
- **Worst Case:** O(n) as the loop iterates through each element of the array `A` once until `st` is found or the end is reached.
- The first loop executes 10 times, so its runtime is constant, contributing a fixed amount of operations.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F84b9759d-3bd7-481b-9da5-01ee09be0953%2F829be078-5627-41ce-962a-a61a1c592729%2Fjd1oef_processed.jpeg&w=3840&q=75)
Transcribed Image Text:```java
/* Worst case scenario:
what is the value of count for an array of size 'n' */
public static boolean linS(int[] A, int st) {
int count = 0;
for( int i=0; i<10; i++ ) {
count++;
System.out.println(count);
}
int idx = 0;
while( idx<A.length ) {
count++;
if( A[idx] == st ) {
break;
}
idx++;
}
return idx < A.length;
}
/* How would we describe the runtime of the above code? */
```
**Explanation:**
This Java code defines a method `linS` that performs a linear search on an array `A` to find a specific integer `st`. It first executes a simple loop 10 times, incrementing and printing a `count` variable each time. It then performs a linear search on the array `A`:
1. **Initialize `count` to 0**: This variable tracks the number of operations.
2. **First loop (constant time loop)**:
- Runs 10 times regardless of the size of `A`.
- Increments the `count` and prints it.
3. **Second loop (linear search on array)**:
- Iterates through each element of `A` from the beginning.
- Increments `count` by 1 for each iteration.
- Breaks the loop if `st` is found.
**Runtime Analysis:**
- **Best Case:** O(1) if `st` is found immediately.
- **Worst Case:** O(n) as the loop iterates through each element of the array `A` once until `st` is found or the end is reached.
- The first loop executes 10 times, so its runtime is constant, contributing a fixed amount of operations.
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