Compilare: main.cpp: In function 'int main()': main.cpp:86:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nave_interdimensionale.in", "r", stdin); ^ main.cpp:87:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nave_interdimensionale.out", "w", stdout); ^ main.cpp:90:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ main.cpp:92:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^ main.cpp: In function 'int count_moves(int*, int)': main.cpp:42:14: warning: iteration 100000 invokes undefined behavior [-Waggressive-loop-optimizations] nul[i] = (cnt[i] == 0) + (i == 0 ? 0 : nul[i - 1]); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:36:22: note: within this loop for(int i = 0; i <= COORD_MAX; i++) { ~~^~~~~~~~~~~~