/in/foo.cc: In function 'int main()':
/in/foo.cc:27:71: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   R(j,0,m-1) R(S,0,(1<<m)-1) R(o1,0,1) R(o2,0,1) if(t=dp[j][S][o1][o2])
                                                                       ^