Compilare: user.cpp: In function ‘void read()’: user.cpp:10:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:10:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void solve1()’: user.cpp:23:13: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(K&1 > 0) ^ user.cpp:16:15: warning: unused variable ‘i’ [-Wunused-variable] long long i; ^ user.cpp:18:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux = 3; ^