Compilare: user.cpp: In function ‘void Solve2()’: user.cpp:135:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nums.size() >= k) ^ user.cpp:122:10: warning: unused variable ‘good’ [-Wunused-variable] bool good = true; ^ user.cpp:123:9: warning: variable ‘res’ set but not used [-Wunused-but-set-variable] int res; ^ user.cpp: In function ‘void Read()’: user.cpp:38:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &p, &n, &k); ^ user.cpp:45:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &val); ^