Compilare: user.cpp: In function ‘void mult(std::vector<int>&, std::vector<int>&, std::vector<int>&)’: user.cpp:97:34: 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:156:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<r.size(); ++i) ^ user.cpp:119:38: 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:120:40: 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:125:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:134:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:141:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:146:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:150:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^