Compilare: user.cpp: In function ‘int main()’: user.cpp:215:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<V.size();++i) ^ user.cpp:236:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<V.size();++i) ^ user.cpp: In function ‘int readInt()’: user.cpp:161:40: 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,BSIZE,stdin); ^ user.cpp:172:40: 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,BSIZE,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:182:27: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eq.in","r",stdin); ^ user.cpp:183:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eq.out","w",stdout); ^ user.cpp:185:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&N,&Q); ^ user.cpp:187:28: 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,BSIZE,stdin); ^