/* cf : F112 /) /) ~ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃ ( •-• ) ~ ♡ You are amazing ♡ / づづ ~ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ */ #include <bits/stdc++.h> using namespace std; #define F first #define S second #define int long long #define Ali ios::sync_with_stdio(false), cin.tie(0), cout.tie(0) const int N = 1e5 + 7; const int P = 233; const int len = 250; const int MOD = 1e9 + 7; const int inf = 1e18; int gcd(int x, int y){ while(y){ x %= y; swap(x, y); } return x; } int binpow(int n, int k){ if (k == 0) return 1; if (k % 2 == 0){ int val = binpow(n, k / 2); return (val * val) % MOD; } return (n * binpow(n, k - 1)) % MOD; } void abb() { int n, m, k; cin >> n >> m >> k; vector < int > a(n + 1); vector < int > b(m + 1); for (int i = 1; i <= n; ++i) cin >> a[i]; for (int i = 1; i <= m; ++i) cin >> b[i]; if (k > m){ cout << "Impossible\n"; return; } int best = inf; for (int mask = 0; mask < (1 << m); ++mask){ if (__builtin_popcount(mask) < k){ continue; } vector < int > chosen; int sum = 0; for (int i = 0; i < m; ++i){ if (mask >> i & 1) chosen.push_back(i + 1), sum += b[i + 1]; } bool ok = true; for (int i = 1; i <= n; ++i){ sum -= a[i]; ok &= (a[i] >= k); } ok &= (sum >= 0); if (ok == true){ if (sum < best){ best = sum; } } } if (best == inf) { cout << "Impossible\n"; return; } cout << best << "\n"; } signed main(){ Ali; int T = 1; // cin >> T; while(T--){ abb(); } }