Compilare: main.cpp: In function 'void Read()': main.cpp:82:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &M); ^ main.cpp:86:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &a, &b), p[i].second.second = i; ^ main.cpp:95:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &a, &b), a = prm[a], b = prm[b]; ^ main.cpp: In function 'int main()': main.cpp:166:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("centrale.in", "r", stdin); ^ main.cpp:167:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("centrale.out", "w", stdout); ^ main.cpp:177:8: warning: 'ras' may be used uninitialized in this function [-Wmaybe-uninitialized] printf ("%d\n", ras + 1); ~~~~~~~^~~~~~~~~~~~~~~~~