/in/foo.cc: In function 'int main()':
/in/foo.cc:19:24: error: 'min' was not declared in this scope
   d[x][y]=min(d[x][y],v);
                        ^
/in/foo.cc:24:43: error: 'min' was not declared in this scope
   d[i][j]=min(d[i][j],d[i][k]+a[k]+d[k][j]);
                                           ^
/in/foo.cc:27:40: error: 'min' was not declared in this scope
   ans=min(ans,d[1][i]+a[i]+d[i][1]+a[1]);
                                        ^