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:109:11: warning: unused variable 'j' [-Wunused-variable] 109 | int i,j,nr; | ^ main.cpp: In function 'long long int caut_bin_op(long long int)': main.cpp:104:12: warning: 'retin' may be used uninitialized in this function [-Wmaybe-uninitialized] 104 | return retin; | ^~~~~ main.cpp: In function 'int main()': main.cpp:134:19: warning: 'retin' may be used uninitialized in this function [-Wmaybe-uninitialized] 134 | update(1,1,k,dr,st,val); | ~~~~~~^~~~~~~~~~~~~~~~~