View Compilation Error

0_0_36895809_18064.cpp: In function 'void solve()':
0_0_36895809_18064.cpp:60:70: error: conversion from 'std::set<long long int>::iterator {aka std::_Rb_tree_const_iterator<long long int>}' to non-scalar type 'std::set<int>::iterator {aka std::_Rb_tree_const_iterator<int>}' requested
                 set<int>::iterator its=maps[mod(tar)].upper_bound(tar);
                                                                      ^