Codeforces Round #434 k-rounding

水题

#include <bits\stdc++.h>using namespace std;#define pb() push_back()long long gcd(long long a,long long b){    if(b==0)return a;    else return gcd(b,a%b);}const int maxn=10;int main(){//  freopen("test.in","r",stdin);long long n;int k;long long tmp=1;cin>>n>>k;for(int i=1;i<=k;i++)    tmp*=10;cout<<n*tmp/gcd(n,tmp);    return 0;}