Compilare: main.cpp: In function 'int main()': main.cpp:12:16: warning: variable 'out' set but not used [-Wunused-but-set-variable] FILE *in, *out; ^~~ main.cpp:16:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &g); ^ main.cpp:27:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &w); ^