Compilare: user.cpp: In function ‘void submultimi()’: user.cpp:10:23: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(i&(1<<j-1)) ^ user.cpp: In function ‘int main()’: user.cpp:18:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("submultimi.in","r",stdin); ^ user.cpp:19:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("submultimi.out","w",stdout); ^ user.cpp:20:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^