Compilare: user.cpp: In function ‘int main()’: user.cpp:16:11: warning: variable ‘fin’ set but not used [-Wunused-but-set-variable] FILE *fin=freopen("ksecv3.in","r",stdin); ^ user.cpp:17:11: warning: variable ‘fout’ set but not used [-Wunused-but-set-variable] FILE *fout=freopen("ksecv3.out","w",stdout); ^ user.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:22:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:38:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:41:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^