Main.cpp: In function 'bool ok(ll)':
Main.cpp:13:8: warning: unused variable 'jum' [-Wunused-variable]
   13 |     ll jum = 0;
      |        ^~~
Main.cpp: In function 'int main()':
Main.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scn("%lld %lld", &n, &m);
      |        ^
Main.cpp:22:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     for(int i=0; i<n; i++) scn("%lld", &a[i]);
      |                               ^
Main.cpp:23:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     for(int i=0; i<n; i++) scn("%lld", &b[i]);
      |                               ^