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authorcrupest <crupest@outlook.com>2020-10-25 17:16:31 +0800
committercrupest <crupest@outlook.com>2020-10-25 17:17:13 +0800
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Add algorithm contest 2.
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diff --git a/algorithm-contest-2/solution/2.cpp b/algorithm-contest-2/solution/2.cpp
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+#define _CRT_SECURE_NO_WARNINGS
+#include <iostream>
+#include <cstdio>
+#include <cstring>
+#include <algorithm>
+#include <vector>
+#include <queue>
+#include <stack>
+#include <set>
+#include <map>
+#include <cmath>
+#include <unordered_map>
+#include <unordered_set>
+#include <string>
+#include <sstream>
+#include <climits>
+#define x first
+#define y second
+#define pub push_back
+#define mp make_pair
+#define ll long long
+using namespace std;
+typedef pair<int, int> PII;
+
+const int MAXN = 1e5 + 5;
+int n, a[MAXN];
+
+int main(void) {
+ cin >> n;
+ for (int i = 1; i <= n; i++) scanf("%d", &a[i]);
+ sort(a + 1, a + 1 + n);
+
+ int l = 1, r = n;
+ ll ans = 0;
+
+ while (l < r) {
+ ans += (a[r--] - a[l++]);
+ }
+ cout << ans;
+ return 0;
+} \ No newline at end of file