atcoder/abc009B

Author: xirc

atcoder/abc009/B/main.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = int64_t;
+using ff = long double;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    int N;
+    vector<int> A;
+    
+    cin >> N;
+    A.assign(N, 0);
+    for (auto &a : A) cin >> a;
+
+    sort(A.begin(), A.end());
+    auto it = unique(A.begin(), A.end());
+    A.erase(it, A.end());
+    reverse(A.begin(), A.end());
+    cout << A[1] << endl;
+
+    return 0;
+}