Compilare: user.cpp: In function ‘int dfs_bi(int)’: user.cpp:44:30: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (!crit[x] && x!=1 || x==1 && cnt>1) ^ user.cpp: In function ‘void solve(int, int)’: user.cpp:128:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < CB[x].size(); ++j) ^ user.cpp:137:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j< CB[x].size(); ++j) ^ user.cpp:145:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j< CB[x].size(); ++j) ^ user.cpp: In function ‘void recon(int, int, bool)’: user.cpp:193:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<CB[x].size(); ++i) ^ user.cpp: In function ‘void solve(int, int)’: user.cpp:156:45: warning: ‘target’ may be used uninitialized in this function [-Wmaybe-uninitialized] mvc_back (0,CB[x].size(),0,target,x); ^