day5: fix build error

src/day5/2.rs

@@ -31,18 +31,16 @@ fn process(data: &str) -> i64 {
                 .lines()
                 .skip(1)
                 .map(|line| {
-                    line.split_ascii_whitespace()
+                    let y: Vec<i64> = line
+                        .split_ascii_whitespace()
                         .map(|y| y.parse::<i64>().unwrap())
-                        .array_chunks::<2>()
-                        .map(|y| {
+                        .collect();
                     let size = y[2];
 
                     (y[1]..y[1] + size, y[0]..y[0] + size)
                 })
                 .collect()
         })
-                .collect()
-        })
         .collect();
     for map in maps {
         let mut out = vec![];