Eroare de compilare: user.cpp:6:75: error: conflicting declaration ‘int prag’ int n, fr[MaxN], v[MaxN], sp[MaxN], valori[MaxN], sums[2 * MaxN], offset, prag; ^ user.cpp:5:26: note: previous declaration as ‘const int prag’ const int MaxN = 250002, prag = 350; ^ user.cpp: In function ‘char nextch()’: user.cpp:14:56: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==BUF_SIZE) fread(buf, BUF_SIZE, 1, f), pos=0; ^