View Compilation Error

0_0_39278300_21408.cpp: In function 'void solve()':
0_0_39278300_21408.cpp:60:10: error: declaration of 'auto it' has no initializer
   60 |     for (auto it; s)
      |          ^~~~
0_0_39278300_21408.cpp:60:19: error: could not convert 's' from 'std::vector<std::pair<long long int, long long int> >' to 'bool'
   60 |     for (auto it; s)
      |                   ^
      |                   |
      |                   std::vector<std::pair<long long int, long long int> >
0_0_39278300_21408.cpp:60:20: error: expected ';' before ')' token
   60 |     for (auto it; s)
      |                    ^
      |                    ;