Main.cpp: In function 'int main(int, char**)':
Main.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
12 | scanf("%d%d", &N, &M);
| ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
15 | scanf("%d", s + i);
| ~~~~~^~~~~~~~~~~~~
Main.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
17 | scanf("%d", f + i);
| ~~~~~^~~~~~~~~~~~~