Create 2523. Closest Prime Numbers in Range (#733)

Author: Chayandas07

2523. Closest Prime Numbers in Range

@@ -0,0 +1,30 @@
+class Solution {
+public:
+    vector<int> closestPrimes(int left, int right) {
+        vector<bool> isPrime(right + 1, true);
+        isPrime[0] = isPrime[1] = false;
+        for (int i = 2; i * i <= right; i++) {
+            if (isPrime[i]) {
+                for (int j = i * i; j <= right; j += i) {
+                    isPrime[j] = false;
+                }
+            }
+        }
+        vector<int> primes;
+        for (int i = left; i <= right; i++) {
+            if (isPrime[i]) primes.push_back(i);
+        }
+        if (primes.size() < 2) return {-1, -1};
+        vector<int> res(2);
+        int minDiff = INT_MAX;
+        for (int i = 1; i < primes.size(); i++) {
+            int diff = primes[i] - primes[i - 1];
+            if (diff < minDiff) {
+                minDiff = diff;
+                res[0] = primes[i - 1];
+                res[1] = primes[i];
+            }
+        }
+        return res;
+    }
+};