Compilare: user.cpp: In function ‘int add_aib(int, int, int)’: user.cpp:44:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:83:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ind < pos.size()) { ^ user.cpp:86:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = ind; i < pos.size(); i++) { ^ user.cpp:93:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; ind < pos.size(); ind++) { ^ user.cpp:72:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evantai.in","r",stdin); ^ user.cpp:73:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evantai.out","w",stdout); ^ user.cpp:75:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:76:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= n; i++) scanf("%d", &v[i]); ^