Compilare: user.cpp: In function ‘int main()’: user.cpp:25:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s.size()<=u&&j<n) ^ user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()>=p)cnt++; ^ user.cpp:33:17: warning: unused variable ‘k’ [-Wunused-variable] int k=s.size(); ^ user.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()<=u&&s.size()>=p)cnt++; ^ user.cpp:36:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()<=u&&s.size()>=p)cnt++; ^ user.cpp:9:34: 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:10:36: 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:11:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&p,&u); ^ user.cpp:15:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^