Contest1390/1390I.cpp

#include<bits/stdc++.h>
using namespace std;
int main() {
    for (int n; cin >> n; ) {
        if (n == 0) {
            cout << "0-->0" << endl;
            continue;
        }
        cout << n << "-->";
        if (n < 0) {
            n *=- 1;
            cout << '-';
        }
        int m = n, k = 0;
        while (m) {
            k++;
            m /= 2;
        }
        for (int i = k - 1; i >= 0; i--) {
            cout << ((n >> i) & 1);
        }
        cout << endl;
    }
    return 0;
}