Compilare: main.cpp: In function 'void cit(int&)': main.cpp:31:58: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax, 1, dim, stdin), pz = 0; ^ main.cpp:37:58: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax, 1, dim, stdin), pz = 0; ^ main.cpp: In function 'int main()': main.cpp:549:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arbint.in", "r", stdin); ^ main.cpp:551:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arbint.out", "w", stdout); ^ main.cpp: In function 'void Build()': main.cpp:467:15: warning: array subscript is outside array bounds [-Warray-bounds] tree[i] = max(tree[i << 1], tree[i << 1 | 1]); ~~~~~~^ main.cpp: In function 'void Update(int, int)': main.cpp:495:59: warning: array subscript is above array bounds [-Warray-bounds] tree[poz] = max(tree[poz << 1], tree[poz << 1 | 1]); ^ main.cpp:495:59: warning: array subscript is above array bounds [-Warray-bounds] main.cpp:495:17: warning: array subscript is above array bounds [-Warray-bounds] tree[poz] = max(tree[poz << 1], tree[poz << 1 | 1]); ~~~~~~~~^