/in/foo.cc: In function 'int main()':
/in/foo.cc:14:27: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         if(k!=j&&!(i&(1<<k-1)))
                          ~^~
/in/foo.cc:15:20: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
           f[i|(1<<k-1)][k]=min(f[i|(1<<k-1)][k],f[i][j]+a[j][k]);
                   ~^~
/in/foo.cc:15:41: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
           f[i|(1<<k-1)][k]=min(f[i|(1<<k-1)][k],f[i][j]+a[j][k]);
                                        ~^~