Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<p.size();i++) ^ user.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(r<p.size() && p[r]==p[r-l])r++; ^ user.cpp:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(r<p.size() && p[r]==p[r-l])r++; ^ user.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<p.size();i++) ^ user.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(r<p.size() && p[r]==p[r-l])r++; ^ user.cpp:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(r<p.size() && p[r]==p[r-l])r++; ^