Compilare: user.cpp: In function ‘int main()’: user.cpp:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<H.size();++i)suma+=H[i].first; ^ user.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<H.size();++i) ^ user.cpp: In function ‘void openIOFiles()’: user.cpp:9:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici3.in","r",stdin); ^ user.cpp:10:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici3.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:17:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:19:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp:22:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&MAX); ^