Compilare: main.cpp: In function 'int main()': main.cpp:26:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for ( int i = 2; i <= q; ++i) ^~~ main.cpp:47:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for ( int i = 1; i <= q; ++i) ^~~ main.cpp:23:6: warning: unused variable 'index' [-Wunused-variable] int index = 1,l = 0,r = 0,q; ^~~~~