feat: add data for Hydro/system_test

Hydro/system_test/2/data/config.yaml

@@ -0,0 +1,4 @@
+type: default
+
+time: 0.5s
+memory: 256m

Hydro/system_test/3/data/checker.cc

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+/**
+ * @file checker.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2021-10-28
+ * 
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#include <bits/stdc++.h>
+
+#include "testlib.h"
+
+using namespace std;
+
+int main(int argc, char* argv[]) {
+    registerTestlibCmd(argc, argv);
+    int n = inf.readInt();
+    for (int i = 1; i <= n; i++)
+        if (ouf.readInt() != i)
+            quitf(_wa, "Wrong Answer.");
+    quit(_ok, "Accepted!");
+}

Hydro/system_test/3/data/config.yaml

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+type: default
+
+time: 1s
+memory: 256m
+
+checker_type: testlib
+checker: checker.cc
+
+cases:
+    - input: data1.in
+    - input: data2.in
+    - input: data3.in
+    - input: data4.in
+    - input: data5.in
+    - input: data6.in
+    - input: data7.in
+    - input: data8.in
+    - input: data9.in
+    - input: data10.in

Hydro/system_test/5/data/config.yaml

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+type: interactive
+time: 100ms
+memory: 64m
+interactor: interactor.cc

Hydro/system_test/5/data/interactor.cc

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+#include <iostream>
+
+#include "testlib.h"
+
+using namespace std;
+
+int main(int argc, char* argv[]) {
+    setName("Interactor A+B");
+    registerInteraction(argc, argv);
+
+    // reads number of queries from test (input) file
+    int a = inf.readInt();
+    int b = inf.readInt();
+    // writes query to the solution, endl makes flush
+    cout << a << " " << b << endl;
+    int ans;
+    cin >> ans;
+    if (a + b == ans)
+        quitf(_ok, "!");
+    else
+        quitf(_wa, "?");
+}