Compilare: user.cpp: In function ‘void Read(int&)’: user.cpp:31:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(f,1,MAX,IN); ^ user.cpp:37:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(f,1,MAX,IN); ^ user.cpp: In function ‘void Readstr(char*)’: user.cpp:47:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(f,1,MAX,IN); ^ user.cpp:53:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(f,1,MAX,IN); ^ user.cpp: In function ‘int main()’: user.cpp:225:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN); ^ user.cpp: In function ‘int getanc(int, int, int, int)’: user.cpp:143:29: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int lw=1,hi=p-1,mid,last; ^~~~ user.cpp: In function ‘int solve(int)’: user.cpp:181:6: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=X,B=L-1; ~^~