include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;

vector[HTML_REMOVED] mul(vector[HTML_REMOVED] &A, int b)
{
vector[HTML_REMOVED] C;
unsigned int t = 0; //进位

//从低位开始乘
for (int i = 0; i < A.size() || t; ++i) {
    if (i < A.size())
        t += A[i] * b;
    C.push_back(t % 10);
    t /= 10; //得到进位  
}

//去掉前导0
//while (C.size() > 1 && C.back() == 0)
//    C.pop_back();


return C;

}

int main(void)
{
string a; //字符串
vector[HTML_REMOVED] A; //存储a字符串的绝对值
unsigned int b; //正整数

cin >> a >> b;
if (b > 1e4)    
    return 1;

if (b == 0) {
    printf("0");
    return 0;
}

//判断a是否负数
if (a[0] == '-') {
    //将字符串转换成容器，逆序
    for (int i = a.size() - 1; i > 0; --i)
        A.push_back(a[i] - '0'); //A[0]是低位 
    auto C = mul(A, b);
    printf("-");
    //逆序输出C
    for (int i = C.size() - 1; i >= 0; --i)
        printf("%d", C[i]);
} else {
    //将字符串转换成容器，逆序
    for (int i = a.size() - 1; i >= 0; --i)
        A.push_back(a[i] - '0'); //A[0]是低位  
    auto C = mul(A, b);
    //逆序输出C
    for (int i = C.size() - 1; i >= 0; --i)
        printf("%d", C[i]);
}

return 0;

} ``