Compilare: user.cpp: In function ‘void insertX(int)’: user.cpp:9:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[rest].size(); i++) { ^ user.cpp: In function ‘void searchX(int)’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[rest].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:38:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in","r",stdin); ^ user.cpp:39:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out","w",stdout); ^ user.cpp:41:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:43:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&op,&x); ^