Compilare: main.cpp: In function 'int main()': main.cpp:18:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 18 | for (i = 2; i <= n;phi[i]=i, ++i); | ^~~ main.cpp:19:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 19 | for (i = 2; i <= n; ++i) | ^~~