problems(rs): add “1502. Can Make Arithmetic Progression From Sequence”

Signed-off-by: Matej Focko <mfocko@redhat.com>

problems/rs/can-make-arithmetic-progression-from-sequence.rs

@@ -0,0 +1,31 @@
+struct Solution {}
+impl Solution {
+    pub fn can_make_arithmetic_progression(mut arr: Vec<i32>) -> bool {
+        arr.sort();
+        let diffs: Vec<i32> = arr.windows(2).map(|pair| pair[1] - pair[0]).collect();
+        diffs.windows(2).all(|pair| pair[0] == pair[1])
+    }
+}
+
+fn main() {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // Input: arr = [3,5,1]
+    // Output: true
+    // Explanation: We can reorder the elements as [1,3,5] or [5,3,1] with differences 2 and -2 respectively, between each consecutive elements.
+    #[test]
+    fn example_1() {
+        assert!(Solution::can_make_arithmetic_progression(vec![3, 5, 1]));
+    }
+
+    // Input: arr = [1,2,4]
+    // Output: false
+    // Explanation: There is no way to reorder the elements to obtain an arithmetic progression.
+    #[test]
+    fn example_2() {
+        assert!(!Solution::can_make_arithmetic_progression(vec![2, 4, 1]));
+    }
+}