Compilare: user.cpp: In function ‘int main()’: user.cpp:39:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("split.in", "r", stdin); ^ user.cpp:40:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("split.out", "w", stdout); ^ user.cpp:43:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:47:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:28:51: warning: array subscript is below array bounds [-Warray-bounds] return max1(maxx[x][k],maxx[y - (1<<k) + 1][k]); ^ user.cpp:28:51: warning: array subscript is below array bounds [-Warray-bounds] return max1(maxx[x][k],maxx[y - (1<<k) + 1][k]); ^ user.cpp:28:51: warning: array subscript is below array bounds [-Warray-bounds] user.cpp:37:5: warning: ‘z1_lsm.23’ may be used uninitialized in this function [-Wmaybe-uninitialized] int main() ^ user.cpp:37:5: warning: ‘x1_lsm.21’ may be used uninitialized in this function [-Wmaybe-uninitialized]