Compilare: user.cpp: In function ‘int main()’: user.cpp:19:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int i=1;i<=N;++i) ^ user.cpp:24:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int j=1;j<=K;++j) ^ user.cpp:28:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int k=1;k<=v[0];++k) ^ user.cpp:34:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int k=0;k<grp;++k) ^ user.cpp:40:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int j=1;j<=v[0];++j) ^ user.cpp:56:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i!=N) ^ user.cpp:69:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i!=N) ^ user.cpp:71:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int j=1;j<=v[0];++j) ^ user.cpp:88:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i!=N) ^ user.cpp:89:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int j=1;j<=v[0];++j) ^ user.cpp:96:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int i=0;i<grp;++i) ^ user.cpp:100:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int k=0;k<grp;++k) ^