Compilare: user.cpp: In function ‘int Median(std::vector<int>&, int, int)’: user.cpp:113:9: warning: unused variable ‘k’ [-Wunused-variable] int k = Med(a,li,lf, m - li); ^ user.cpp: In function ‘void NiceSort(std::vector<int>&, int, int)’: user.cpp:123:9: warning: unused variable ‘k’ [-Wunused-variable] int k = Med(a,li,lf, m - li); ^ user.cpp: In function ‘int Select(std::vector<int>&, int, int, int)’: user.cpp:134:9: warning: unused variable ‘k’ [-Wunused-variable] int k = Median(a,li,lf); ^ user.cpp: In function ‘void Read()’: user.cpp:179:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&K); ^ user.cpp:182:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&A[i]); ^ user.cpp: In function ‘int main()’: user.cpp:198:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sdo.in","r",stdin); ^ user.cpp:199:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sdo.out","w",stdout); ^