1#!/usr/bin/env python
2
3import sys, os, struct
4
5if len(sys.argv) < 2:
6    print ("not enough args, usage:")
7    print ("%s <binfile>" % sys.argv[0])
8    sys.exit(1)
9
10f = open(sys.argv[1], "r+b")
11
12a = struct.unpack('iiiiiii', f.read(7*4))
13
14s = 0
15for i in a:
16    s += i
17s = -s
18
19f.seek(7*4)
20f.write(struct.pack('i', s))
21
22f.close()
23
24