/in/foo.cc: In function 'int main()':
/in/foo.cc:24:30: warning: self-comparison always evaluates to false [-Wtautological-compare]
                 if(sta&(1<<j)!=(1<<j)) continue;
                        ~~~~~~^~~~~~~~
/in/foo.cc:24:30: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]