Compilare: user.cpp: In function ‘void back_add(int, long long int)’: user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pas == divs[add_id].size()) { ^ user.cpp: In function ‘void solve()’: user.cpp:75:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:107:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("porcjoc.in","r",stdin); ^ user.cpp:108:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("porcjoc.out","w",stdout); ^ user.cpp:114:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:116:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v, &p); ^