foo.cc: In function 'void Build(int, int, int)':
foo.cc:17:49: warning: narrowing conversion of 'x[l]' from 'int' to 'double' inside { } [-Wnarrowing]
         t[Node]={x[l]*1.0*x[l],x[l]*1.0*y[l],x[l],y[l],inf,inf,inf,inf};
                                              ~~~^
foo.cc:17:54: warning: narrowing conversion of 'y[l]' from 'int' to 'double' inside { } [-Wnarrowing]
         t[Node]={x[l]*1.0*x[l],x[l]*1.0*y[l],x[l],y[l],inf,inf,inf,inf};
                                                   ~~~^

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