20240308 Finished

src/problem/mod.rs

@@ -67,3 +67,4 @@ mod p232_implement_queue_using_stacks;
 mod p1976_number_of_ways_to_arrive_at_destination;
 mod p2917_find_the_k_or_of_an_array;
 mod p2575_find_the_divisibility_array_of_a_string;
+mod p2834_find_the_minimum_possible_sum_of_a_beautiful_array;

src/problem/p2834_find_the_minimum_possible_sum_of_a_beautiful_array.rs

@@ -0,0 +1,38 @@
+/**
+ * [2834] Find the Minimum Possible Sum of a Beautiful Array
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+impl Solution {
+    pub fn minimum_possible_sum(n: i32, target: i32) -> i32 {
+        let n = n as i64;
+        let target = target as i64;
+        let m = 1e9 as i64 + 7;
+        
+        let length = target / 2;
+
+        if length >= n {
+            ((1 + n ) * n / 2 % m ) as i32
+        } else {
+            (((1 + length) * length / 2 
+                + (target + target + n - length - 1) * (n - length) / 2) % m)
+            as i32
+        }
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2834() {
+        assert_eq!(4, Solution::minimum_possible_sum(2, 3));
+        assert_eq!(8, Solution::minimum_possible_sum(3, 3));
+        assert_eq!(1, Solution::minimum_possible_sum(1, 1));
+    }
+}