Main.cc: In function ‘int main()’: Main.cc:11:17: error: ‘kb’ was not declared in this scope cin >> n >> kb ^~ Main.cc:11:17: note: suggested alternative: ‘k’ cin >> n >> kb ^~ k Main.cc:12:19: error: ‘i’ was not declared in this scope for(int i = 1;i <= n;i++) ^