include

include

include

using namespace std;
stack<int>st;
int main(){
int a;
int b[100];
while(cin>>a){//循环输入
int i=0;
while(a!=0){//做模2除法
b[i]=a%2;
a=a/2;
i++;
}
for(int j=0;j<i;++j)//用栈做逆序输出
st.push(b[j]);
int x=0;
while(!st.empty()){
b[x]=st.top();
st.pop();
x++;
}
for(int j=0;j<i;j++)
cout<<b[j];
cout<<endl;
}
return 0;
}</int>