Add 23275.cpp

Hiyabye · Aug 20, 2024 · 062c6b2 · 062c6b2
1 parent ea39954
commit 062c6b2
Showing 1 changed file with 26 additions and 0 deletions.
diff --git a/23xxx/23275.cpp b/23xxx/23275.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#include <unordered_set>
+using namespace std;
+
+void solve(void) {
+  int n; cin >> n;
+  unordered_set<int> s;
+  for (int i=0; i<n; i++) {
+    int x; cin >> x;
+    s.insert(x);
+  }
+
+  for (int i=1; i<n; i++) {
+    int x; cin >> x;
+    s.erase(x);
+  }
+  cout << *s.begin();
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr);
+
+  solve();
+  return 0;
+}