/in/foo.cc: In function 'int main()':
/in/foo.cc:22:15: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         f[1<<i-1]=0;sl[1<<i-1][i]=1;
              ~^~
/in/foo.cc:22:28: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         f[1<<i-1]=0;sl[1<<i-1][i]=1;
                           ~^~
/in/foo.cc:23:24: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         for(int j=(1<<i-1)+1;j<1<<n;++j){
                       ~^~
/in/foo.cc:30:43: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
                         int t=j&(~(1<<q[l]-1));
                                       ~~~~^~
/in/foo.cc:9:19: warning: unused variable 'anss' [-Wunused-variable]
     int n,m,ans=D,anss=0;
                   ^~~~