/in/foo.cc: In function 'int main()':
/in/foo.cc:75:30: warning: iteration 57 invokes undefined behavior [-Waggressive-loop-optimizations]
                 if((fj_biao[k] & cur_state) == 0) {
                     ~~~~~~~~~^
/in/foo.cc:74:26: note: within this loop
             for(int k=1;k<=MAXNR;k++) {
                          ^
/in/foo.cc:59:20: warning: iteration 56 invokes undefined behavior [-Waggressive-loop-optimizations]
         fj_biao[i] = biao_num;
         ~~~~~~~~~~~^~~~~~~~~~
/in/foo.cc:43:18: note: within this loop
     for(int i=2;i<=MAXNR;i++) {
                  ^