diff --git a/.gitignore b/.gitignore
index 71c7e11..2a73ca0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 a.out
 main
 .vscode
-vgcore*
\ No newline at end of file
+vgcore*
+output.txt
\ No newline at end of file
diff --git a/input.py b/input.py
new file mode 100644
index 0000000..699f4a9
--- /dev/null
+++ b/input.py
@@ -0,0 +1,11 @@
+import sys
+
+try:
+  n = int(sys.argv[1])
+except:
+  n = 5
+
+print(n)
+
+for i in range(n):
+  print(i, -i if i % 2 == 0 else i)
\ No newline at end of file
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..941d338
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+gcc main.c
+python input.py $1 | tee /dev/fd/2 | ./a.out | tee output.txt
\ No newline at end of file