Compilare: main.cpp: In function 'int main()': main.cpp:48:53: 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:49:55: 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:51:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &K); ^ main.cpp:53:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &x[i], &y[i]); ^ main.cpp: In function 'int Solve(int*)': main.cpp:39:21: warning: 'where' may be used uninitialized in this function [-Wmaybe-uninitialized] cnt[where]++; ^ main.cpp:40:16: warning: 'who' may be used uninitialized in this function [-Wmaybe-uninitialized] cnt[who]--; ~~~~~~~^