Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:208:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < knode[x].size(); ++ i) ^ user.cpp:219:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[x].size(); ++ i) ^ user.cpp:205:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘void solve()’: user.cpp:268:12: warning: unused variable ‘x’ [-Wunused-variable] int i, x, y, k; ^ user.cpp:268:15: warning: unused variable ‘y’ [-Wunused-variable] int i, x, y, k; ^ user.cpp:268:18: warning: unused variable ‘k’ [-Wunused-variable] int i, x, y, k; ^ user.cpp: In function ‘void update(int, int)’: user.cpp:9:21: warning: ‘i’ is used uninitialized in this function [-Wuninitialized] #define zeros(x) (x & (-x)) ^ user.cpp:184:9: note: ‘i’ was declared here int i; ^ user.cpp: In function ‘int query(int)’: user.cpp:9:21: warning: ‘i’ is used uninitialized in this function [-Wuninitialized] #define zeros(x) (x & (-x)) ^ user.cpp:194:9: note: ‘i’ was declared here int i, res = 0; ^