add solution in rust & golang: 506. Relative Ranks

Signed-off-by: rajput-hemant <[email protected]>

Author: rajput-hemant

src/0501-0600/506 - Relative Ranks/README.md src/0501-0600/506 - Relative Ranks/README.md

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"sort"
+)
+
+func findRelativeRanks(score []int) []string {
+	sorted_score := append([]int(nil), score...)
+	sort.Slice(sorted_score, func(i, j int) bool {
+		return sorted_score[i] > sorted_score[j]
+	})
+
+	rank := make(map[int]string)
+
+	for i, v := range sorted_score {
+		switch i {
+		case 0:
+			rank[v] = "Gold Medal"
+		case 1:
+			rank[v] = "Silver Medal"
+		case 2:
+			rank[v] = "Bronze Medal"
+		default:
+			rank[v] = fmt.Sprintf("%d", i+1)
+		}
+	}
+
+	result := make([]string, len(score))
+	for i, v := range score {
+		result[i] = rank[v]
+	}
+
+	return result
+}

src/0501-0600/506 - Relative Ranks/RelativeRanks.java src/0501-0600/506 - Relative Ranks/RelativeRanks.java

@@ -0,0 +1,24 @@
+impl Solution {
+    pub fn find_relative_ranks(score: Vec<i32>) -> Vec<String> {
+        let mut score_sorted = score.clone();
+        score_sorted.sort_unstable_by(|a, b| b.cmp(a));
+
+        let mut map = HashMap::new();
+        for (i, s) in score_sorted.iter().enumerate() {
+            map.insert(s, i + 1);
+        }
+
+        score
+            .iter()
+            .map(|s| {
+                let rank = map.get(s).unwrap();
+                match rank {
+                    1 => "Gold Medal".to_string(),
+                    2 => "Silver Medal".to_string(),
+                    3 => "Bronze Medal".to_string(),
+                    _ => rank.to_string(),
+                }
+            })
+            .collect()
+    }
+}