Main.cpp: In function 'int main()':
Main.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
9 | scanf("%lld %lld", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
Main.cpp:11:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
11 | for (auto &e: a) scanf("%lld", &e);
| ~~~~~^~~~~~~~~~~~
Main.cpp:12:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
12 | for (auto &e: b) scanf("%lld", &e);
| ~~~~~^~~~~~~~~~~~