Compilare: user.cpp: In function ‘long long int Solve(unsigned int)’: user.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int dr=1;dr<=n;dr++) { ^ user.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(length>l) { ^ user.cpp: In function ‘int main()’: user.cpp:33:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) { ^ user.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) { ^ user.cpp:29:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in","r",stdin); ^ user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out","w",stdout); ^ user.cpp:32:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&u,&l); ^ user.cpp:34:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^