1095C - Powers Of Two - CodeForces Solution

bitmasks greedy *1400

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Python Code: 

from sys import stdin, stdout

n, k = map(int, stdin.readline().split())

bits = list(map(lambda i: n >> i & 1, range(33)))

if k > n or k < sum(bits):
    print("NO")
else:
    ans = {i: bits[i] for i in range(33)}
    curr = sum(bits)

    for pow in range(32, 0, -1):
        if curr == k:
            break
        smt = min(ans[pow], k - curr)

        curr += smt
        ans[pow - 1] += 2 * smt
        ans[pow] -= smt

    print("YES")
    check = 0

    for i in range(33):
        pp = str(2**i)

        for app in range(ans[i]):
            check += int(pp)
            stdout.write(pp)
            stdout.write(" ")

    print()

C++ Code: 

#include <bits/stdc++.h>
using namespace std;
#define SR()                      \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);
#define endl '\n'
#define MOD 1000000007
#define ff first
#define ss second
#define pb push_back
#define pf push_front
#define all(s) s.begin(), s.end()

const double pi = acos(-1);
typedef long long ll;
typedef unsigned long long ull;
void File()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
}

int main()

{
    SR();
    ll n, m;
    cin >> n >> m;
    bitset<32> aa = n;
    // cout << aa << endl;
    priority_queue<ll> ppq;
    for (int i = 0; i < 32; i++)
    {
        if (aa[i] == 1)
        {
            ppq.push(pow(2, i));
        }
    }
    ll cnt = ppq.size();
    if (m < cnt || m > n)
        cout << "NO" << endl;
    else
    {
        cout << "YES" << endl;
        while (cnt++ != m)
        {
            ll ini = ppq.top();
            ppq.pop();
            ppq.push(ini / 2);
            ppq.push(ini / 2);
        }
        while(!ppq.empty())
        {
            cout << ppq.top() << " ";
            ppq.pop();
        }
        cout << endl;
    }

    return 0;
}


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