Compilare: user.cpp: In function ‘void Read(int&)’: user.cpp:32:36: 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:38:36: 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:48:36: 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:54:36: 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:261:22: 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:192:29: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int lw=p+1,hi=N,mid,last; ^~~~ user.cpp: In function ‘int solve(int)’: user.cpp:223:12: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=R+1,B=Z; ~^~ user.cpp:217:6: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] A=X,B=L-1; ~^~