Compilare: user.cpp: In function ‘int main()’: user.cpp:34:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < G[i].size(); k++) ^ user.cpp:37:26: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if ((1<<u-1)&j) ^ user.cpp:39:48: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int newdp = dp[i-1][j^(1<<u-1)] + 1; ^ user.cpp:40:52: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int newways = ways[i-1][j^(1<<u-1)]; ^