solved problem 2, day 2

day2/src/part2.rs

@@ -1,4 +1,62 @@
+use std::fs;
 
 pub fn part2() {
+    let file_contents = fs::read_to_string("./input.txt").unwrap();
 
+    let sum: i64 = file_contents
+        .lines()
+        .map(|x| {
+            if x.len() > 1 {
+                get_game_power(x.get(x.find(':').unwrap()..).unwrap())
+            } else {
+                0
+            }
+        })
+        .sum();
+
+    println!("The sum of products is: {}", sum);
+}
+
+fn get_game_power(input: &str) -> i64 {
+
+    let mut max_red: i64 = 0;
+    let mut max_green: i64 = 0;
+    let mut max_blue: i64 = 0;
+    let mut cur_val: i64 = 0;
+    let mut prior_char: char = ' ';
+
+    let _: Vec<_> = input.chars()
+        .map(|x| {
+            if x.is_digit(10) {
+                if prior_char.is_digit(10) {
+                    cur_val = cur_val * 10 + x.to_digit(10).unwrap() as i64;
+                } else {
+                    cur_val = x.to_digit(10).unwrap() as i64;
+                }
+            }
+
+            if prior_char == ' ' && (x == 'r' || x == 'g' || x == 'b') {
+                match x {
+                    'r' => {
+                        max_red = std::cmp::max(max_red, cur_val);
+                    },
+                    'g' => {
+                        max_green = std::cmp::max(max_green, cur_val);
+                    }, 
+                    'b' => {
+                        max_blue = std::cmp::max(max_blue, cur_val);
+                    }
+                    _ => {
+
+                    }
+                }
+            }
+
+            prior_char = x;
+
+            //ignore spaces
+
+        }).collect();
+
+    return max_red * max_green * max_blue;
 }