View Compilation Error

0_0_39579545_7926.cpp: In function 'P cal(int, int)':
0_0_39579545_7926.cpp:101:41: error: request for member 'w2' in 'w1.std::pair<int, int>::second', which is of non-class type 'int'
  101 |     return P(min(w1.fi,w2.fi),max(w1.se.w2.se));
      |                                         ^~