Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:113:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = k; i < sol.size(); ++i) ^ user.cpp: In function ‘void scan(int&)’: user.cpp:23:59: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz == DIM) fread(buffer,1,DIM,stdin),poz = 0; ^ user.cpp:28:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,DIM,stdin),poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:136:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dans.in","r",stdin); ^ user.cpp:137:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dans.out","w",stdout); ^ user.cpp:140:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^