Compilare: user.cpp: In function ‘int main()’: user.cpp:30:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nr<M && currA<a.size() && currB < b.size()) { ^ user.cpp:30:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nr<M && currA<a.size() && currB < b.size()) { ^ user.cpp:41:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(currA < a.size()) { ^ user.cpp:12:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scandura.in","r",stdin); ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scandura.out","w",stdout); ^ user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&M); ^ user.cpp:16:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^