Compilare: user.cpp: In function ‘int main()’: user.cpp:29:9: warning: unused variable ‘n’ [-Wunused-variable] int n,i; ^ user.cpp:29:11: warning: unused variable ‘i’ [-Wunused-variable] int n,i; ^ user.cpp:30:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("combinari.in", "r", stdin); ^ user.cpp:31:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("combinari.out", "w", stdout); ^ user.cpp:32:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&K); ^