Compilare: main.cpp: In function 'void erase(int)': main.cpp:15:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<v[h].size();it++) ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:36: 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); ^ main.cpp:34:38: 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); ^ main.cpp:35:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:38:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p,&x); ^