atcoder/abc020B

Author: xirc

atcoder/abc020/B/main.cpp

@@ -0,0 +1,19 @@
+#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);
+
+    string A, B;
+    cin >> A >> B;
+    stringstream ss(A + B);
+    int C;
+    ss >> C;
+    cout << (C * 2) << endl;
+
+    return 0;
+}