Compilare: user.cpp: In function ‘int gen(int)’: user.cpp:34:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<s[i].size();j++) ^ user.cpp:52:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<a.size()-1;i++) ^ user.cpp:20:9: warning: variable ‘val’ set but not used [-Wunused-but-set-variable] int val,k; ^ user.cpp:20:13: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int val,k; ^ user.cpp: In function ‘int main()’: user.cpp:82:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[i].size()<Min) ^