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:224:22: 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:143:27: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int lw=pos+1,hi=N,last,mid; ^~~~ user.cpp: In function ‘int solve(int)’: user.cpp:186:12: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=R+1,B=Z; ~^~ user.cpp:184:8: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=Y+1,B=R; ~^~ user.cpp:180:6: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=X,B=L-1; ~^~