Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'long long int solve(int, long long int)': main.cpp:31:39: warning: unused variable 'sol_poz' [-Wunused-variable] int st = 1, dr = L[nod].size()-1, sol_poz = 0; ^~~~~~~ main.cpp: In function 'int main()': main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[i].size();j++){ ~^~~~~~~~~~~~