Compilare: user.cpp: In function ‘void era(int)’: user.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[x].size();++i) ^ user.cpp:61:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<h[nod].size();++j) ^ user.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h[nod].size()<K) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<h[x].size();++j) ^ user.cpp: In function ‘int main()’: user.cpp:100:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h[i].size()<K&&!che[i]) ^