/in/foo.cc: In function 'int main()':
/in/foo.cc:20:12: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 if (j&(1<<s-1)==0) continue;
           ~^~
/in/foo.cc:20:15: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
 if (j&(1<<s-1)==0) continue;
       ~~~~~~~~^~~
/in/foo.cc:24:33: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 dp[j][s]=min(dp[j][s],dp[j^(1<<s-1)][p]+cost[p][s]);
                                ~^~