/in/foo.cc:3:18: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 int n, k,num[1<<9+5],t,now,i,j,nex;
                 ~^~
/in/foo.cc:4:27: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 long long f[2][9*9+5][1<<9+5];
                          ~^~
/in/foo.cc:5:15: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 bool flag[1<<9+5];
              ~^~