View Compilation Error

0_0_37727787_7223.cpp: In function 'int main()':
0_0_37727787_7223.cpp:36:30: error: converting to 'std::tuple<int, int, int>' from initializer list would use explicit constructor 'constexpr std::tuple< <template-parameter-1-1> >::tuple(_UElements&& ...) [with _UElements = {int, int&, int&}; <template-parameter-2-2> = void; _Elements = {int, int, int}]'
                 dis[++cnt_e] = {
                              ^
0_0_37727787_7223.cpp:43:54: error: 'sort' was not declared in this scope
         sort(dis.begin() + 1, dis.begin() + cnt_e + 1);
                                                      ^