Compilare: main.cpp: In function 'int main()': main.cpp:12:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 12 | for(j=4;j<=n;j+=2) | ^~~ main.cpp:14:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 14 | if(n>=2) | ^~ main.cpp:9:19: warning: unused variable 'r' [-Wunused-variable] 9 | int n,i,j,k=0,r; | ^