Compilare: user.cpp: In function ‘void Solve(int)’: user.cpp:30:23: warning: unused variable ‘sol’ [-Wunused-variable] long long NR = 1, sol = 1; ^ user.cpp: In function ‘int main()’: user.cpp:91:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &N, &M); ^