Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[x].size(); i++) ^ user.cpp: In function ‘void kosajaru(int)’: user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<transpose[x].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:57:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<components[i].size(); j++) ^ user.cpp:36:15: warning: unused variable ‘i’ [-Wunused-variable] int x, y, i; ^