View Compilation Error

0_0_39272355_21337.cpp: In function 'void upd(long long int, long long int, long long int)':
0_0_39272355_21337.cpp:18:49: error: 'struct nod' has no member named 'w'
   18 |         if(tr[x].l==p&&p==tr[x].r) return tr[x].w+=y,void();
      |                                                 ^