Compilare: user.cpp: In function ‘std::pair<nod*, nod*> split(nod*, int)’: user.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n->l->size == poz){ ^ user.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(n->l->size < poz){ ^ user.cpp: In function ‘unsigned int access(nod*, int)’: user.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n->l->size == poz) return n->key; ^ user.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(n->l->size > poz) return access(n->l, poz); ^ user.cpp: In function ‘nod* insert(nod*, int, int)’: user.cpp:66:68: warning: narrowing conversion of ‘key’ from ‘const int’ to ‘unsigned int’ inside { } [-Wnarrowing] return join(join(p.first, new nod { key, 1, rand(), 0, &nil, &nil }), p.second); } ^ user.cpp:66:51: warning: narrowing conversion of ‘rand()’ from ‘int’ to ‘unsigned int’ inside { } [-Wnarrowing] return join(join(p.first, new nod { key, 1, rand(), 0, &nil, &nil }), p.second); } ^