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Welcome to the Maximum Subarray in Rust page! Here, you'll find the source code for this program as well as a description of how the program works.
use std::env::args;
use std::process::exit;
use std::str::FromStr;
use std::cmp::max;
fn usage() -> ! {
println!("Usage: Please provide a list of integers in the format: \"1, 2, 3, 4, 5\"");
exit(0);
}
fn parse_int<T: FromStr>(s: &str) -> Result<T, <T as FromStr>::Err> {
s.trim().parse::<T>()
}
fn parse_int_list<T: FromStr>(s: &str) -> Result<Vec<T>, <T as FromStr>::Err> {
s.split(',')
.map(parse_int)
.collect::<Result<Vec<T>, <T as FromStr>::Err>>()
}
// Find maximum subarray using Kadane's algorithm.
// Source: https://en.wikipedia.org/wiki/Maximum_subarray_problem#No_empty_subarrays_admitted
fn maximum_subarray(arr: &Vec<i32>) -> i32 {
let mut best_sum: i32 = i32::MIN;
let mut current_sum: i32 = 0;
for value in arr {
current_sum = value + max(0, current_sum);
best_sum = max(current_sum, best_sum);
}
best_sum
}
fn main() {
let mut args = args().skip(1);
// Convert 1st command-line argument to list of integers
let mut arr: Vec<i32> = args
.next()
.and_then(|s| parse_int_list(&s).ok())
.unwrap_or_else(|| usage());
// Get maximum subarray and display
println!("{}", maximum_subarray(&arr));
}
Maximum Subarray in Rust was written by:
If you see anything you'd like to change or update, please consider contributing.
Note: The solution shown above is the current solution in the Sample Programs repository as of May 08 2023 19:53:07. The solution was first committed on Apr 09 2023 10:53:37. As a result, documentation below may be outdated.
No 'How to Implement the Solution' section available. Please consider contributing.
No 'How to Run the Solution' section available. Please consider contributing.