Compilare: user.cpp: In function ‘int cb(int, int)’: user.cpp:48:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr != lista[pos].size()){ ^ user.cpp: In function ‘int main()’: user.cpp:105:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<lista[i].size(); ++j){ ^ user.cpp:121:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<lista[ where[pos] ].size(); ++j){ ^ user.cpp: In function ‘void next()’: user.cpp:67:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(S, 1, Cifmax, stdin); poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:82:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumainilecurate.in", "r", stdin); ^