Merge pull request #25 from JAYKALIA007/main

solution 7 week 3

Author: JAYKALIA007

Questions/week 3/solution_7.cpp

@@ -0,0 +1,88 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+#define pii pair<int, int>
+class Solution {
+
+public:
+	int getMinDiff(int arr[], int n, int k)
+	{
+
+		if (n == 1)
+			return 0;
+
+		sort(arr, arr + n);
+
+		vector<pii> t;
+
+		map<int, int> m;
+
+		int n_ = 1;
+
+		t.push_back(pii(arr[0] + k, arr[0]));
+
+		t.push_back(pii(arr[0] - k, arr[0]));
+
+		for (int i = 1; i < n; i++) {
+
+			if (arr[i] != arr[i - 1]) {
+
+				t.push_back(pii(arr[i] + k, arr[i]));
+
+				t.push_back(pii(arr[i] - k, arr[i]));
+
+				m[arr[i]] = 0;
+
+				n_++;
+			}
+		}
+
+		sort(t.begin(), t.end());
+
+		int l = 0, r = 0;
+
+		int ans = t[t.size() - 1].first - t[0].first;
+
+		int count = 0;
+
+		while (r < t.size()) {
+
+			while (r < t.size() and count < n_) {
+
+				if (m[t[r].second] == 0)
+					count++;
+
+				m[t[r].second]++;
+
+				r++;
+			}
+
+			if (r == t.size() and count < n_)
+				break;
+
+			ans = min(ans, t[r - 1].first - t[l].first);
+
+			while (l <= r and count >= n_) {
+
+				if (m[t[l].second] == 1)
+					count--;
+
+				m[t[l].second]--;
+
+				ans = min(ans, t[r - 1].first - t[l].first);
+
+				l++;
+			}
+		}
+
+		return ans;
+	}
+};
+
+int main()
+{
+	Solution s;
+	int k = 5, n = 10;
+	int arr[n] = { 8, 1, 5, 4, 7, 5, 7, 9, 4, 6 };
+	cout << s.getMinDiff(arr, n, k);
+}