Compilare: main.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 3 | #pragma GCC optimization ("O3") | main.cpp:4: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 4 | #pragma GCC optimization ("unroll-loops") | main.cpp: In function 'int main()': main.cpp:115:35: warning: array subscript has type 'char' [-Wchar-subscripts] 115 | arb.rangeUpdate(x, y, mpp[z]); | ^