Compilare: main.cpp: In function 'int query2(int)': main.cpp:36:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(step = 1; step<n ; step <<= 1); ^~~ main.cpp:39:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=0; step; step >>= 1) ^~~ main.cpp:34:16: warning: unused variable 'poz' [-Wunused-variable] int step,i,poz=0; ^~~