Compilare: user.cpp: In function ‘void read()’: user.cpp:15:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; ++i) ^ user.cpp: In function ‘long long int nrSecv(int, std::vector<unsigned int>*)’: user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; ++i){ ^ user.cpp:26:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < H[hPos].size(); ++j) ^ user.cpp: In function ‘void read()’: user.cpp:13:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(iname, "r", stdin); ^ user.cpp:14:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u %u %u", &n, &l, &u); ^ user.cpp:16:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u", a+i); ^ user.cpp: In function ‘int main()’: user.cpp:60:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(oname, "w", stdout); ^