Compilare: user.cpp: In function ‘int dfs(int, int)’: user.cpp:41:32: warning: operation on ‘sf’ may be undefined [-Wsequence-point] timp[++sf] = dfs(y, sf); ^ user.cpp: In function ‘int main()’: user.cpp:55:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &teste); ^ user.cpp:58:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &n); ^ user.cpp:62:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d%d", &x, &y); ^