add test data

test/testcases/pi.c

@@ -0,0 +1,33 @@
+#include "io.inc"
+int f[2801];
+int main() {
+  int a = 10000;
+  int b = 0;
+  int c = 2800;
+  int d = 0;
+  int e = 0;
+  int g = 0;
+
+  for (; b - c != 0;)
+    f[b++] = a / 5;
+  for (;; e = d % a) {
+    d = 0;
+    g = c * 2;
+    if (g == 0)
+      break;
+
+    for (b = c;; d = d * b) {
+      d = d + f[b] * a;
+      f[b] = d % --g;
+      d = d / g--;
+      if (--b == 0)
+        break;
+    }
+
+    c = c - 14;
+    printInt(e + d / a);
+  }
+
+  printStr("\n");
+  return judgeResult % Mod;  // 137
+}