Compilare: main.cpp: In function 'void cit(int&)': main.cpp:16:58: 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:19:58: 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:275:37: 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:276:39: 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:218:19: warning: array subscript is above array bounds [-Warray-bounds] aib1[i + bit(i)] = max(aib1[i + bit(i)], aib1[i]); ~~~~~~~~~~~~~~~^ main.cpp:222:19: warning: array subscript is above array bounds [-Warray-bounds] aib2[i - bit(i)] = max(aib2[i - bit(i)], aib2[i]); ~~~~~~~~~~~~~~~^