Compilare: user.cpp: In function ‘void computeA()’: user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < as.size(); i++) { ^ user.cpp: In function ‘void computeB()’: user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < bs.size(); i++) { ^ user.cpp: In function ‘long long int computeResult()’: user.cpp:50:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < b.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:64:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("calcul.in", "r", stdin); ^ user.cpp:65:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("calcul.out", "w", stdout); ^