/in/foo.cc: In function 'int main()':
/in/foo.cc:2:20: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 #define rep(i,l,r) for(register int i=(l);i<=(r);i++)
                    ^
/in/foo.cc:28:3: note: in expansion of macro 'rep'
   rep(j,0,25) k=gcd(k,cnt[r][j]-cnt[l-1][j]); int limit=sqrt(k);
   ^~~
/in/foo.cc:28:47: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   rep(j,0,25) k=gcd(k,cnt[r][j]-cnt[l-1][j]); int limit=sqrt(k);
                                               ^~~