Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:13:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p[root].size(); i++) { ^ user.cpp:16:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < e[nod].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:38:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < e[0].size(); i++) { ^ user.cpp:40:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < e[aux1].size(); j++) { ^ user.cpp:52:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (b > p[a].size()) { ^ user.cpp:29:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &n, &m); ^ user.cpp:33:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &aux); ^ user.cpp:51:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &a, &b); ^