Day 1 Part 2

day1/answer2

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+24869388

day1/p2.rs

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+use std::env;
+use std::fs;
+use std::process;
+use std::{thread, time};
+use std::collections::HashMap;
+
+fn main() {
+    //println!("Hello world!");
+
+    let args: Vec<String> = env::args().collect();
+    let mut path = String::from("");
+
+    if args.len() > 1 {
+         path = args[1].clone();
+    } else {
+        println!("Specify an input file!");
+        process::exit(1);
+    }
+
+    if ! fs::metadata(path.clone()).is_ok() {
+        println!("Path does not exist!");
+        process::exit(1);
+    }
+
+    //let rawInput = fs::read_to_string(path.clone()).unwrap();
+    //let splitInput: Vec<&str> = rawInput.lines().collect();
+
+    let mut left: Vec<i32> = vec![];
+    let mut right: Vec<i32> = vec![];
+
+    for line in fs::read_to_string(path.clone()).unwrap().lines() {
+        //let line = splitInput[i];
+        let split: Vec<&str> = line.split("   ").collect();
+
+        //println!("{}",split[0]);
+
+        left.push(split[0].parse().unwrap());
+        right.push(split[1].parse().unwrap());
+    }
+
+    left.sort();
+    right.sort();
+
+    let mut leftDup = HashMap::new();
+    let mut rightDup = HashMap::new();
+
+    // This is kinda ass but I don't care :)
+    let mut i: usize = 0;
+    while i < left.len() {
+        let mut k: usize = i;
+        while k < left.len() && left[i] == left[k] {
+            k+=1;
+        }
+
+        leftDup.insert(left[i],k-i);
+
+        i = k;
+    }
+
+    //println!("{}", leftDup[&3]);
+
+    i = 0;
+    while i < right.len() {
+        let mut k: usize = i;
+        while k < right.len() && right[i] == right[k] {
+            k+=1;
+        }
+
+        rightDup.insert(right[i],k-i);
+
+        i = k;
+    }
+
+    //println!("{}", rightDup[&3]);
+
+    let mut accum: i32 = 0;
+    for (left, num) in &leftDup {
+        let shit = match rightDup.get(left) {
+            Some(val) => *val,
+            None => 0,
+        };
+        accum += (*left * (*num as i32)) * (shit as i32);
+    }
+
+    println!("{}", accum);
+}