View Compilation Error

0_0_17229316_6902.cpp: In function 'int main()':
0_0_17229316_6902.cpp:77:38: error: no matching function for call to 'segment::change(int, int, ll&, ll&, ll&, ll)'
     T.change(1,1,n,st[x],ed[x],y-a[x]);
                                      ^
0_0_17229316_6902.cpp:77:38: note: candidate is:
0_0_17229316_6902.cpp:34:7: note: void segment::change(ll, ll, ll, ll&, ll&, ll&)
  void change(ll t,ll l,ll r,ll &x,ll &y,ll &k){
       ^
0_0_17229316_6902.cpp:34:7: note:   no known conversion for argument 6 from 'll {aka long long int}' to 'll& {aka long long int&}'