Compilare: user.cpp:84:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() { ^ user.cpp: In function ‘int main()’: user.cpp:109:19: warning: unused variable ‘mi’ [-Wunused-variable] long long mi = 1LL*v[0]*v[0]; ^ user.cpp:110:19: warning: unused variable ‘mx’ [-Wunused-variable] long long mx = 1LL*v[n-1]*v[n-1]; ^ user.cpp:86:23: warning: unused variable ‘T’ [-Wunused-variable] long long C,p1,p2,T; ^ user.cpp: In function ‘char nxt()’: user.cpp:29:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(blc, 1, BL, fin); ^