Compilare: user.cpp: In function ‘bool find_x(std::vector<int>&, int)’: user.cpp:76:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < v.size()) { ^ user.cpp:81:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + p < v.size()) { ^ user.cpp: In function ‘int main()’: user.cpp:148:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < divisors.size(); ++i) { ^ user.cpp:125:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perioada01.in", "r", stdin); ^ user.cpp:126:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perioada01.out", "w", stdout); ^