add test data

test/testcases/tak.c

@@ -0,0 +1,15 @@
+#include "io.inc"
+int tak(int x, int y, int z) {
+  if (y < x)
+    return 1 + tak(tak(x - 1, y, z), tak(y - 1, z, x), tak(z - 1, x, y));
+  else
+    return z;
+}
+
+int main() {
+  int a = 18;
+  int b = 12;
+  int c = 6;
+  printInt(tak(a, b, c));
+  return judgeResult % Mod;  // 186
+}