Compilare: user.cpp: In function ‘int cb(int, int)’: user.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr != lista[pos].size()){ ^ user.cpp: In function ‘int main()’: user.cpp:101:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<lista[i].size(); ++j){ ^ user.cpp:105:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == lista[i].size()-1) lista[i][j].minPos = j; ^ user.cpp:128:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<lista[ where[pos] ].size(); ++j){ ^ user.cpp:133:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == lista[i].size()-1) lista[i][j].minPos = j; ^ user.cpp: In function ‘void next()’: user.cpp:63:35: 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:78:46: 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); ^