borowing nonsense

day4/src/main.rs

@@ -1,5 +1,4 @@
 use std::fs::read_to_string;
-use std::cmp;
 
 fn main() {
     enum ParsingState {
@@ -8,7 +7,6 @@ fn main() {
         WinningNumbers,
         PlayerNumbers,
     }
-    #[derive(Copy, Clone)]
     struct Card {
         amount: i32,
         winning: i32,
@@ -49,16 +47,18 @@ fn main() {
             }
         }
         sum1 += score;
-        cards.push(Card { amount: 1, winning: num_winning })
+        cards.push(Card { amount: 1, winning: num_winning });
     }
     let cards_len = cards.len();
     for i in 0..cards_len {
-        let card = cards[i];
+        let (slice1, slice2) = cards.split_at_mut(i + 1);
+        let card = &slice1[i];
         sum2 += card.amount;
-        for j in i+1 .. cmp::min(i + 1 + card.winning as usize, cards_len) {
-            cards[j].amount += card.amount;
+        for j in 0 .. card.winning as usize {
+            slice2[j].amount += card.amount;
         }
     }
+
     println!("Sum1: {}", sum1);
     println!("Sum2: {}", sum2);
 }