Compilare: user.cpp: In function ‘void expand(node, int)’: user.cpp:59:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz+(1<<p)-1<v[el.b].size()&&v[el.b][poz+(1<<p)-1].s<el.t) ^ user.cpp:62:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=poz;i<v[el.b].size()&&v[el.b][i].s<=el.t+value;i++) ^ user.cpp: In function ‘bool check(int)’: user.cpp:78:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[1].size();i++) ^ user.cpp:85:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ^