slow ass part 2

(needs improved)

rust/day7/src/main.rs

@@ -32,6 +32,29 @@ fn calc_fuel_for_pos(v: &Vec<i64>, pos: i64) -> i64 {
     return total;
 }
 
+fn calc_fuel_for_pos_part2(v: &Vec<i64>, pos: i64) -> i64 {
+    let mut diff = 0;
+    let mut fuel = 0;
+
+    for x in v {
+        if x > &pos {
+            diff = x - pos;
+        } else if x < &pos {
+            diff = pos - x;
+        } else {
+            diff = 0
+        }
+
+        if diff > 0 {
+            for i in 1..diff+1 {
+                fuel += i;
+            }
+        }
+    }
+
+    return fuel;
+}
+
 fn get_max(v: &Vec<i64>) -> i64 {
     let mut max = 0;
     for i in v {
@@ -42,7 +65,7 @@ fn get_max(v: &Vec<i64>) -> i64 {
     return max
 }
 
-fn main() {
+fn part1() {
     let pos = load_file().unwrap();
     let max = get_max(&pos);
 
@@ -60,5 +83,31 @@ fn main() {
         }
     }
 
-    println!("lowest consumption is pos {} with {} fuel", lastpos, lowest);
+    println!("part 1 lowest consumption is pos {} with {} fuel", lastpos, lowest);
+}
+
+fn part2() {
+    let pos = load_file().unwrap();
+    let max = get_max(&pos);
+
+    let mut lowest = 0;
+    let mut lastpos = 0;
+
+    for i in 0..max {
+        let fuel = calc_fuel_for_pos_part2(&pos, i);
+        if i == 0 {
+            lowest = fuel;
+        }
+        if fuel < lowest {
+            lowest = fuel;
+            lastpos = i;
+        }
+    }
+
+    println!("part 2 lowest consumption is pos {} with {} fuel", lastpos, lowest);
+}
+
+fn main() {
+    part1();
+    part2();
 }