徐崇尧 · 发布于 2026-02-02 · 浏览 205 回复 0

int a, n;
cin >> a >> n;
int b = 0, sum = 0;
for (int i = 1; i <= n; i++) {
	b = b * 10 + a;
	sum = sum + b;
}
cout << sum;
return 0;