Compilare: main.cpp:2:0: warning: ignoring #pragma gcc optimize [-Wunknown-pragmas] #pragma gcc optimize("O3") main.cpp: In function 'int main()': main.cpp:25:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(ll i=1;i<=n;i++) ^~~ main.cpp:27:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(ll i=0;i<n;i++) ^~~