Compilare: main.cpp:7:1: warning: 'typedef' was ignored in this declaration typedef struct listNode ^~~~~~~ main.cpp: In function 'void readGraph(char*)': main.cpp:69:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ main.cpp:78:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^