foo.cc: In function 'int cal(int, int, int, int)':
foo.cc:11:31: error: 'INT_MAX' was not declared in this scope
   11 |     if (a > n || b > n)return INT_MAX;
      |                               ^~~~~~~
foo.cc:3:1: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
    2 | #include <iostream>
  +++ |+#include <climits>
    3 | using namespace std;

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