Compilare: main.cpp: In member function 'char InParser::read_ch()': main.cpp:15:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ main.cpp: In function 'int main()': main.cpp:152:60: warning: 'ans2' may be used uninitialized in this function [-Wmaybe-uninitialized] int st = 0, dr = min(ss[0], pp[0])-1, m, ans1, ans2, mx = 0; ^~~~ main.cpp:152:54: warning: 'ans1' may be used uninitialized in this function [-Wmaybe-uninitialized] int st = 0, dr = min(ss[0], pp[0])-1, m, ans1, ans2, mx = 0; ^~~~