Precreation contest files

misc/chuyen-de-xau/b4.cpp

@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+string S[100];
+
+bool check(const string &a, const string &b) {
+  const string ab = a + b, ba = b + a;
+  if (stoi(ab) < stoi(ba))
+    return false;
+  return true;
+}
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  freopen("B4.INP", "r", stdin);
+
+  int n;
+  cin >> n;
+  for (int i = 0; i < n; i++) {
+    string a;
+    cin >> a;
+    S[i] = a;
+  }
+
+  sort(S, S + n, check);
+  for (int i = 0; i < n; i++) {
+    cout << S[i];
+  }
+  cout << '\n';
+}