Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i = 0; i < edge[node].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void update(int, int)': main.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(i = x; i <= lin.size(); i += (i & -i)) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:43:15: warning: unused variable 'j' [-Wunused-variable] 43 | int n, i, j, q, t; | ^ main.cpp:43:21: warning: unused variable 't' [-Wunused-variable] 43 | int n, i, j, q, t; | ^