Compilare: user.cpp: In function ‘void ins()’: user.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<a.size();j++) ^ user.cpp: In function ‘void finds()’: user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<100&&i+j<=s.size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=s.size();i++) ^