Compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: warning: variable ‘nod’ set but not used [-Wunused-but-set-variable] int nod, NR = 0, Sol = 0, cost = 0, top = 1, pos; ^ user.cpp:15:14: warning: unused variable ‘NR’ [-Wunused-variable] int nod, NR = 0, Sol = 0, cost = 0, top = 1, pos; ^ user.cpp:15:22: warning: unused variable ‘Sol’ [-Wunused-variable] int nod, NR = 0, Sol = 0, cost = 0, top = 1, pos; ^ user.cpp:10:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in", "r", stdin); ^ user.cpp:11:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out", "w", stdout); ^ user.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:13:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n ; ++i) scanf("%d", &a[i]); ^ user.cpp:14:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n ; ++i) scanf("%d", &b[i]); ^