/in/foo.cc: In function 'int min_index(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
/in/foo.cc:14:19: error: 'INT_MAX' was not declared in this scope
   14 |     int min_val = INT_MAX;
      |                   ^~~~~~~
/in/foo.cc:4:1: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
    3 | #include<limits>
  +++ |+#include <climits>
    4 | using namespace std;
/in/foo.cc:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int j = 0; j < vec.size(); j++) {
      |                     ~~^~~~~~~~~~~~