Compilare: user.cpp: In function ‘void read()’: user.cpp:18:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &N, &M, &noI); ^ user.cpp:20:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &I[i].x, &I[i].y); ^ user.cpp: In function ‘bool Back(mutherfucker, int)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^