Compilare: main.cpp: In function 'std::vector<int> my_mult(std::vector<int>, int)': main.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+1<cur.size();i++) ~~~^~~~~~~~~~~ main.cpp: In function 'void my_add(std::vector<int>&, std::vector<int>)': main.cpp:53:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<b.size();i++) ~^~~~~~~~~ main.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+1<cur.size();i++) ~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:124:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("spoiler.in","r",stdin); ^ main.cpp:125:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("spoiler.out","w",stdout); ^ main.cpp:127:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i",&n,&k); ^