Compilare: main.cpp: In function 'long long unsigned int go(int)': main.cpp:49:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (Hash.size() > x) { ~~~~~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:62:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in", "r", stdin); ^ main.cpp: In function 'char readChar()': main.cpp:9:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(rbuf, 1, BUFSIZE, stdin); ^