| 1 | pub fn cal_points(ops: Vec<String>) -> i32 { |
| 2 | let mut arr = vec!(); |
| 3 | for e in ops { |
| 4 | if e == "C".to_string() { |
| 5 | arr.pop(); |
| 6 | } else if e == "D".to_string() { |
| 7 | let tmp = arr.iter().last().unwrap() * 2; |
| 8 | arr.push(tmp); |
| 9 | } else if e == "+".to_string() { |
| 10 | let start = &arr.len() - 2; |
| 11 | arr.push(arr[start..].iter().sum::<i32>()); |
| 12 | } else { |
| 13 | let num: i32 = e.parse().unwrap(); |
| 14 | arr.push(num); |
| 15 | } |
| 16 | } |
| 17 | arr.iter().sum() |
| 18 | } |
| 19 | |
| 20 | fn main() { |
| 21 | let ops = vec!["5","-2","4","C","D","9","+","+"].iter().map(|e|e.to_string()).collect(); |