Compilare: user.cpp: In function ‘int main()’: user.cpp:62:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:63:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %lld",&n,&k); ^ user.cpp:65:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.cpp: In function ‘int solve()’: user.cpp:56:12: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^ user.cpp:46:25: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] tot+=pos; ^