Compilare: user.cpp: In function ‘double Cost(int, int, int, int, int, int)’: user.cpp:41:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (x11 = x22) ^ user.cpp:56:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (x11 = x22) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:154:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<L[k].size(); j++) ^ user.cpp: In function ‘void DFS_2(int)’: user.cpp:169:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<L[k].size(); j++) ^