Compilare: main.cpp: In function 'int main()': main.cpp:57:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ main.cpp:60:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ main.cpp:101:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^ main.cpp: In function 'void dfs(int)': main.cpp:39:27: warning: 'from' may be used uninitialized in this function [-Wmaybe-uninitialized] path_dad[path[from]] = node; ~~~~~~~~~^