/in/foo.cc: In function 'void init()':
/in/foo.cc:23:14: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations]
    fib[i][j] = f[gcd(i, j)];
    ~~~~~~~~~~^~~~~~~~~~~~~~
/in/foo.cc:22:21: note: within this loop
   for (int j = 1; j <= MAXN; j++)
                     ^
/in/foo.cc:19:8: warning: iteration 1010023 invokes undefined behavior [-Waggressive-loop-optimizations]
   f[i] = (f[i - 1] + f[i - 2]) % CA;
        ^
/in/foo.cc:18:20: note: within this loop
  for (int i = 2; i <= MAXN * MAXN; i++)
                    ^