Compilare: user.cpp: In function ‘void mult(std::vector<int>&, std::vector<int>&, std::vector<int>&)’: user.cpp:99:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (n<max(p.size(),q.size())) n*=2; ^ user.cpp: In function ‘int main()’: user.cpp:169:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<r.size(); ++i) ^ user.cpp:121:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.in","r",stdin); ^ user.cpp:122:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.out","w",stdout); ^ user.cpp:138:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:147:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:154:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:159:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:163:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^