View Compilation Error

0_0_36373793_15834.cpp: In function 'void node_update(ll, ll, ll, ll, ll, ll)':
0_0_36373793_15834.cpp:43:36: error: 'd' was not declared in this scope
         sum[p*2]=lazy[p]*(mid-s+1),d[p*2+1]=lazy[p]*(t-mid),
                                    ^