Compilare: user.cpp: In function ‘int main()’: user.cpp:76:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz < muchii.size() && muchii[poz].cost >= cost_cerut) ^ user.cpp:87:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size() && j < same.size()) ^ user.cpp:87:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size() && j < same.size()) ^ user.cpp:91:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size()) qs.push_back(change[i++]); ^ user.cpp:92:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < same.size()) qs.push_back(same[j++]); ^ user.cpp:43:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("luff.in", "r", stdin); ^ user.cpp:44:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("luff.out", "w", stdout); ^