Compilare: user.cpp: In function ‘void recons(int, int, int)’: user.cpp:35:10: warning: unused variable ‘OK’ [-Wunused-variable] bool OK = true; ^ user.cpp: In function ‘int main()’: user.cpp:64:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in", "r", stdin); ^ user.cpp:65:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out", "w", stdout); ^ user.cpp:67:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:71:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &a[i][j]); ^ user.cpp:84:24: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] recons(xx, yy, Max); ^ user.cpp:84:24: warning: ‘xx’ may be used uninitialized in this function [-Wmaybe-uninitialized]