Compilare: main.cpp: In function 'void Read(long long int&)': main.cpp:42:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:47:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp: In function 'int binsearch(long long int, long long int)': main.cpp:62:12: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^~~~ main.cpp: In function 'int main()': main.cpp:94:24: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] ans = binsearch(K, D); ~~~~~~~~~^~~~~~