Compilare: main.cpp: In member function 'void Solver::dfs(int, int)': main.cpp:47:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= g[node].size(); i ++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:60:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dp[son][k] != -1 && (j - k) < dp2[i - 1].size() && dp2[i - 1][j - k] != -1) ~~~~~~~~^~~~~~~~~~~~~~~~~~~