Compilare: main.cpp: In function 'int updateOrInsert(long long int)': main.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[reminder].size() && foundIndex < 0; i++) { ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:77:12: warning: unused variable 'val' [-Wunused-variable] long long val; ^~~