add test data

test/testcases/hanoi.c

@@ -0,0 +1,30 @@
+#include "io.inc"
+
+int cd(int d, char *a, char *b, char *c, int sum) {
+  if (d == 1) {
+    printStr("move ");
+    printStr(a);
+    printStr(" --> ");
+    printStr(c);
+    sum++;
+  } else {
+    sum = cd(d - 1, a, c, b, sum);
+    printStr("move ");
+    printStr(a);
+    printStr(" --> ");
+    printStr(c);
+    sum = cd(d - 1, b, a, c, sum);
+    sum++;
+  }
+  return sum;
+}
+
+int main() {
+  char a[5] = "A";
+  char b[5] = "B";
+  char c[5] = "C";
+  int d = 10;
+  int sum = cd(d, a, b, c, 0);
+  printInt(sum);
+  return judgeResult % Mod;  // 20
+}