View Compilation Error

0_0_30161492_14634.cpp: In function 'int main()':
0_0_30161492_14634.cpp:54:45: error: 'struct node' has no member named 'w'
             cin >> a[i].x >> a[i].y >> a[i].w;
                                             ^
0_0_30161492_14634.cpp:69:45: error: 'struct node' has no member named 'w'
                         update(a[k].y, a[k].w);
                                             ^