Compilare: user.cpp: In function ‘void get_data(int, int)’: user.cpp:61:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for0(j, tree[nod].size()) ^ user.cpp:2:39: note: in definition of macro ‘for0’ #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp: In function ‘void dfs(int, ll)’: user.cpp:83:15: warning: statement has no effect [-Wunused-value] print(nod); ^ user.cpp:91:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < tree[nod].size(); i++) sum[i] = sum[i - 1] + tree[nod][i].second + sub[tree[nod][i].first]; ^ user.cpp:94:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for0(i, tree[nod].size()) ^ user.cpp:2:39: note: in definition of macro ‘for0’ #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:108:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for0(i, tree[nod].size()) ^ user.cpp:2:39: note: in definition of macro ‘for0’ #define for0(i, n) for(int i = 0; i < n; i++) ^