Compilare: main.cpp:6:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("O3") main.cpp:7:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("unroll-loops") main.cpp: In function 'void RMQ()': main.cpp:146:34: warning: array subscript has type 'char' [-Wchar-subscripts] mask=stare[y]/p[MODL[x-1]]; ^ main.cpp: In function 'int main()': main.cpp:185:29: warning: array subscript has type 'char' [-Wchar-subscripts] while(vf>=1&&v[st[vf]]>=v[i]) ^ main.cpp:187:29: warning: array subscript has type 'char' [-Wchar-subscripts] yy^=p[MODL[st[vf]-1]]; ^ main.cpp:187:33: warning: array subscript has type 'char' [-Wchar-subscripts] yy^=p[MODL[st[vf]-1]]; ^ main.cpp:190:16: warning: array subscript has type 'char' [-Wchar-subscripts] st[++vf]=i; ^ main.cpp:191:24: warning: array subscript has type 'char' [-Wchar-subscripts] yy+=p[MODL[i-1]]; ^ main.cpp: In member function 'void InputReader::nxt()': main.cpp:18:48: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, sizeof(char), BUFF_SIZE, f); ^