View Compilation Error

0_0_38113213_29715.cpp: In function 'void solve()':
0_0_38113213_29715.cpp:199:71: error: invalid use of 'auto'
   for (int i = 0; i < out.size(); i++) add(out[i].first, out[i].second);
                                                                       ^
0_0_38113213_29715.cpp:200:68: error: invalid use of 'auto'
   for (int i = 0; i < in.size(); i++) add(in[i].first, in[i].second);
                                                                    ^