Compilare: main.cpp: In function 'long long int calc_comb(long long int, long long int)': main.cpp:12:15: warning: unused variable 'a_b' [-Wunused-variable] long long a_b; ^~~ main.cpp: In function 'void rez()': main.cpp:31:17: warning: unused variable 'p' [-Wunused-variable] long long k,p,sm=0,nrgr,rez=0; ^ main.cpp:31:19: warning: unused variable 'sm' [-Wunused-variable] long long k,p,sm=0,nrgr,rez=0; ^~