Compilare: user.cpp: In function ‘int main()’: user.cpp:75:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz < muchii.size() && muchii[poz].cost >= cost_cerut) ^ user.cpp:85:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size() && j < same.size()) ^ user.cpp:85:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size() && j < same.size()) ^ user.cpp:89:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < change.size()) qs[i + j] = change[i], ++i; ^ user.cpp:90:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < same.size()) qs[i + j] = same[j], ++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); ^